diff --git a/src/hooks/useBatchSpotCommunityScores.ts b/src/hooks/useBatchSpotCommunityScores.ts
index 23e1693..b563cf7 100644
--- a/src/hooks/useBatchSpotCommunityScores.ts
+++ b/src/hooks/useBatchSpotCommunityScores.ts
@@ -36,7 +36,7 @@ const blankSignals = (): AccountSignals => ({
 export function useBatchSpotCommunityScores(
   spots: Array<{ id: string; pubkey: string; identifier: string }>,
 ) {
-  const { querySkateContent } = useSkateRelays();
+  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
 
   const refs = useMemo(
     () => spots.map((s) => `${SKATE_SPOT_KIND}:${s.pubkey}:${s.identifier}`),
@@ -49,7 +49,7 @@ export function useBatchSpotCommunityScores(
   }, [spots]);
 
   return useQuery<Map<string, SpotCommunityMini>>({
-    queryKey: ['batch-spot-community', refs.slice().sort().join(',')],
+    queryKey: ['batch-spot-community', refs.slice().sort().join(','), getQueryKeySuffix()],
     enabled: refs.length > 0,
     staleTime: 2 * 60 * 1000,
     queryFn: async (c) => {
diff --git a/src/hooks/useBatchTrustScores.ts b/src/hooks/useBatchTrustScores.ts
index 4a59cbd..c8d0877 100644
--- a/src/hooks/useBatchTrustScores.ts
+++ b/src/hooks/useBatchTrustScores.ts
@@ -15,7 +15,7 @@ export function useBatchTrustScores(pubkeys: string[]) {
   const { user } = useCurrentUser();
 
   return useQuery({
-    queryKey: ['batch-trust-scores', pubkeys.sort().join(','), user?.pubkey],
+    queryKey: ['batch-trust-scores', [...pubkeys].sort().join(','), user?.pubkey],
     queryFn: async (c) => {
       const signal = AbortSignal.any([c.signal, AbortSignal.timeout(8000)]);
       const scores = new Map<string, number>();
diff --git a/src/hooks/useGrowthStats.ts b/src/hooks/useGrowthStats.ts
index 65b8375..5762c7a 100644
--- a/src/hooks/useGrowthStats.ts
+++ b/src/hooks/useGrowthStats.ts
@@ -174,8 +174,14 @@ function fillMonthGaps(keys: string[]): string[] {
 
 // ─── Hook ────────────────────────────────────────────────────────────────────
 
-export function useGrowthStats() {
-  // Community stats read from the CANONICAL community relay (goskatespots) only,
+/** Stable, short hash of a string — keeps a query key small with many hidden items. */
+function tinyHash(input: string): number {
+  let h = 0;
+  for (let i = 0; i < input.length; i++) h = (h * 31 + input.charCodeAt(i)) | 0;
+  return h;
+}
+
+export function useGrowthStats() {  // Community stats read from the CANONICAL community relay (goskatespots) only,
   // so the numbers always match the authoritative community dataset — not a
   // blend of the user's personal relays that would drift per-device.
   const { queryCanonical } = useSkateRelays();
@@ -183,7 +189,11 @@ export function useGrowthStats() {
   // it, so a spot the community removed can't inflate the numbers. The moderation
   // set is part of the query key so the stats recompute once the labels load.
   const hidden = useAdminModeration();
-  const hiddenSig = `${hidden.coords.size}:${hidden.ids.size}`;
+  // Sig must change when the SET changes, not just its size — hiding one item
+  // while unhiding another (same count) must still recompute the stats.
+  const hiddenSig = `${hidden.coords.size}:${hidden.ids.size}:${tinyHash(
+    `${[...hidden.coords].sort().join(',')}#${[...hidden.ids].sort().join(',')}`,
+  )}`;
 
   return useQuery<GrowthStats>({
     queryKey: ['growth-stats', 'canonical', hiddenSig],
diff --git a/src/hooks/useLocalReminders.ts b/src/hooks/useLocalReminders.ts
index 7683a21..4e4e17a 100644
--- a/src/hooks/useLocalReminders.ts
+++ b/src/hooks/useLocalReminders.ts
@@ -26,7 +26,7 @@ function useMyRsvpCoords(): Set<string> {
   const { user } = useCurrentUser();
 
   const query = useQuery({
-    queryKey: ['my-rsvp-coords', user?.pubkey, getQueryKeySuffix()],
+    queryKey: ['my-rsvp-coords', 'reminders', user?.pubkey, getQueryKeySuffix()],
     enabled: !!user?.pubkey,
     staleTime: 60_000,
     queryFn: async (c): Promise<string[]> => {
diff --git a/src/hooks/useNewsletterIssues.ts b/src/hooks/useNewsletterIssues.ts
index f5b1446..77ff49f 100644
--- a/src/hooks/useNewsletterIssues.ts
+++ b/src/hooks/useNewsletterIssues.ts
@@ -22,7 +22,7 @@ export function useNewsletterIssues(limit = 30) {
   const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
 
   return useQuery({
-    queryKey: ['newsletter-issues', getQueryKeySuffix()],
+    queryKey: ['newsletter-issues', limit, getQueryKeySuffix()],
     staleTime: 5 * 60 * 1000,
     gcTime: 30 * 60 * 1000,
     queryFn: async (c): Promise<SkateNewsletterIssue[]> => {
diff --git a/src/hooks/usePreferences.ts b/src/hooks/usePreferences.ts
index 324c96d..3e96995 100644
--- a/src/hooks/usePreferences.ts
+++ b/src/hooks/usePreferences.ts
@@ -59,13 +59,13 @@ export function usePreferences() {
   const setPreferences = useCallback(
     (patch: Partial<Omit<Preferences, 'updatedAt'>>) => {
       const now = Math.floor(Date.now() / 1000);
-      setLocal((prev) => {
-        const next: Preferences = { ...prev, ...patch, updatedAt: now };
-        void synced.patch(next);
-        return next;
-      });
+      // Compute OUTSIDE the updater: a state updater must be pure (React may run
+      // it twice), and `synced.patch` publishes an encrypted event.
+      const next: Preferences = { ...local, ...patch, updatedAt: now };
+      setLocal(next);
+      void synced.patch(next);
     },
-    [setLocal, synced],
+    [local, setLocal, synced],
   );
 
   return { preferences: local, setPreferences };
diff --git a/src/hooks/useSellerSales.ts b/src/hooks/useSellerSales.ts
index 3e3886e..f95d807 100644
--- a/src/hooks/useSellerSales.ts
+++ b/src/hooks/useSellerSales.ts
@@ -86,7 +86,7 @@ export function useBatchSellerSales(pubkeys: string[]) {
   const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
 
   return useQuery({
-    queryKey: ['batch-seller-sales', pubkeys.sort().join(','), getQueryKeySuffix()],
+    queryKey: ['batch-seller-sales', [...pubkeys].sort().join(','), getQueryKeySuffix()],
     queryFn: async () => {
       if (pubkeys.length === 0) return new Map<string, number>();
 
diff --git a/src/hooks/useSkateRelays.ts b/src/hooks/useSkateRelays.ts
index 48e5b01..75d55bb 100644
--- a/src/hooks/useSkateRelays.ts
+++ b/src/hooks/useSkateRelays.ts
@@ -179,7 +179,7 @@ export function useSkateRelays() {
    */
   const getQueryKeySuffix = (): string => {
     const relays = getReadRelays();
-    return relays.sort().join(',');
+    return [...relays].sort().join(',');
   };
 
   return {
diff --git a/src/hooks/useSpotCommunityScore.ts b/src/hooks/useSpotCommunityScore.ts
index ed7bd4c..100a4d7 100644
--- a/src/hooks/useSpotCommunityScore.ts
+++ b/src/hooks/useSpotCommunityScore.ts
@@ -124,11 +124,11 @@ export function communityLevel(breakdown: SpotCommunityBreakdown, score: number)
 export function useSpotCommunityScore(
   spot: Pick<{ pubkey: string; identifier: string; id: string }, 'pubkey' | 'identifier' | 'id'> | null | undefined,
 ) {
-  const { querySkateContent } = useSkateRelays();
+  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
   const coord = spot ? `${SKATE_SPOT_KIND}:${spot.pubkey}:${spot.identifier}` : undefined;
 
   const query = useQuery<NostrEvent[]>({
-    queryKey: ['spot-community-score', coord, spot?.id],
+    queryKey: ['spot-community-score', coord, spot?.id, getQueryKeySuffix()],
     enabled: !!spot && !!coord,
     staleTime: 2 * 60 * 1000,
     queryFn: async () => {
diff --git a/src/hooks/useZaps.ts b/src/hooks/useZaps.ts
index 9c8e110..666b582 100644
--- a/src/hooks/useZaps.ts
+++ b/src/hooks/useZaps.ts
@@ -61,6 +61,7 @@ export function useZaps(
         const events = await nostr.query([{
           kinds: [9735],
           '#a': [`${actualTarget.kind}:${actualTarget.pubkey}:${identifier}`],
+          limit: 500,
         }], { signal });
         return events;
       } else {
@@ -68,6 +69,7 @@ export function useZaps(
         const events = await nostr.query([{
           kinds: [9735],
           '#e': [actualTarget.id],
+          limit: 500,
         }], { signal });
         return events;
       }
@@ -92,9 +94,12 @@ export function useZaps(
       // Method 1: amount tag (from zap request, sometimes copied to receipt)
       const amountTag = zap.tags.find(([name]) => name === 'amount')?.[1];
       if (amountTag) {
-        const millisats = parseInt(amountTag);
-        sats += Math.floor(millisats / 1000);
-        return;
+        const millisats = Number(amountTag);
+        if (Number.isFinite(millisats) && millisats > 0) {
+          sats += Math.floor(millisats / 1000);
+          return;
+        }
+        // Malformed amount — fall through to the bolt11 method.
       }
 
       // Method 2: Extract from bolt11 invoice
diff --git a/src/lib/types.ts b/src/lib/types.ts
index 957cbe5..22a727b 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -1020,6 +1020,11 @@ export function parseSkateEvent(event: NostrEvent): SkateEvent | null {
 
   if (!d || !title || !start || !hasSkateboardingTag) return null;
 
+  // Reject a malformed timestamp — NaN in `start` poisons sorting and date
+  // rendering for the whole feed.
+  const startNum = Number(start);
+  if (!Number.isFinite(startNum) || startNum <= 0) return null;
+
   // Validate title length
   if (title.trim().length < MIN_TITLE_LEN || title.length > MAX_TITLE_LEN) return null;
 
@@ -1039,8 +1044,8 @@ export function parseSkateEvent(event: NostrEvent): SkateEvent | null {
     identifier: d,
     title: title.slice(0, MAX_TITLE_LEN),
     description: event.content.slice(0, MAX_DESCRIPTION_LEN),
-    start: parseInt(start),
-    end: end ? parseInt(end) : undefined,
+    start: startNum,
+    end: end && Number.isFinite(Number(end)) ? Number(end) : undefined,
     geohash,
     location,
     image,
@@ -3252,13 +3257,16 @@ export function parseSkateTour(event: NostrEvent): SkateTour | null {
   const geohash = event.tags.find(([name]) => name === 'g')?.[1];
   const meetingPoint = event.tags.find(([name]) => name === 'meeting-point')?.[1];
   const meetingCoordsTag = event.tags.find(([name]) => name === 'meeting-point-coords');
-  const meetingPointCoords = meetingCoordsTag 
-    ? { lat: parseFloat(meetingCoordsTag[1]), lon: parseFloat(meetingCoordsTag[2]) }
+  const mpLat = Number(meetingCoordsTag?.[1]);
+  const mpLon = Number(meetingCoordsTag?.[2]);
+  const meetingPointCoords = meetingCoordsTag && Number.isFinite(mpLat) && Number.isFinite(mpLon)
+    ? { lat: mpLat, lon: mpLon }
     : undefined;
   const image = event.tags.find(([name]) => name === 'image')?.[1];
   
   const durationTag = event.tags.find(([name]) => name === 'duration');
-  const duration = durationTag ? parseFloat(durationTag[1]) : undefined;
+  const durationNum = durationTag ? Number(durationTag[1]) : undefined;
+  const duration = durationNum !== undefined && Number.isFinite(durationNum) ? durationNum : undefined;
   const durationUnit = durationTag?.[2] as SkateTour['durationUnit'] || 'hours';
   
   const skillLevel = event.tags.find(([name]) => name === 'skill-level')?.[1] as SkateTour['skillLevel'];