diff --git a/services/platform-service/src/modules/broadcasts/repository.ts b/services/platform-service/src/modules/broadcasts/repository.ts
index 2e1d0916..1547c98d 100644
--- a/services/platform-service/src/modules/broadcasts/repository.ts
+++ b/services/platform-service/src/modules/broadcasts/repository.ts
@@ -324,7 +324,7 @@ export async function recordReadReceipt(
   userId: string,
   productId: string,
   action: 'read' | 'click' | 'dismiss'
-): Promise<void> {
+): Promise<boolean> {
   const container = getContainer('broadcast_reads');
   const id = `${broadcastId}:${userId}`;
   const now = new Date().toISOString();
@@ -334,6 +334,13 @@ export async function recordReadReceipt(
 
     if (existing) {
       const receipt = existing as BroadcastRead;
+      const alreadyRecorded =
+        (action === 'read' && !!receipt.readAt) ||
+        (action === 'click' && !!receipt.clickedAt) ||
+        (action === 'dismiss' && !!receipt.dismissedAt);
+      if (alreadyRecorded) {
+        return false;
+      }
       const updates: Partial<BroadcastRead> & { updatedAt: string } = {
         updatedAt: now,
       };
@@ -345,6 +352,7 @@ export async function recordReadReceipt(
         ...receipt,
         ...updates,
       });
+      return true;
     } else {
       const receipt: BroadcastRead = {
         id,
@@ -357,6 +365,7 @@ export async function recordReadReceipt(
         createdAt: now,
       };
       await container.items.create(receipt);
+      return true;
     }
   } catch (err) {
     if ((err as { code?: number }).code === 404) {
@@ -372,6 +381,7 @@ export async function recordReadReceipt(
         createdAt: now,
       };
       await container.items.create(receipt);
+      return true;
     } else {
       throw err;
     }
diff --git a/services/platform-service/src/modules/broadcasts/routes.ts b/services/platform-service/src/modules/broadcasts/routes.ts
index b734a1e9..8c44201e 100644
--- a/services/platform-service/src/modules/broadcasts/routes.ts
+++ b/services/platform-service/src/modules/broadcasts/routes.ts
@@ -3,6 +3,7 @@
  * @module broadcasts/routes
  */
 
+import { randomUUID } from 'node:crypto';
 import type { FastifyInstance } from 'fastify';
 import {
   UnauthorizedError,
@@ -78,7 +79,7 @@ async function adminRoutes(app: FastifyInstance): Promise<void> {
 
     const now = new Date().toISOString();
     const broadcast: Broadcast = {
-      id: `bcast_${Date.now()}_${Math.random().toString(36).slice(2, 7)}`,
+      id: `bcast_${randomUUID()}`,
       productId,
       ...input,
       status: input.scheduledAt ? BroadcastStatus.SCHEDULED : BroadcastStatus.DRAFT,
@@ -317,12 +318,12 @@ async function adminRoutes(app: FastifyInstance): Promise<void> {
     const now = new Date().toISOString();
     const cloned: Broadcast = {
       ...existing,
-      id: `bcast_${Date.now()}_${Math.random().toString(36).slice(2, 7)}`,
+      id: `bcast_${randomUUID()}`,
       title: `${existing.title} (Clone)`,
       status: BroadcastStatus.DRAFT,
       variant: variant ?? 'treatment',
       parentBroadcastId: existing.id,
-      experimentId: existing.experimentId ?? `exp_${Date.now()}`,
+      experimentId: existing.experimentId ?? `exp_${randomUUID()}`,
       metrics: {
         targetedCount: 0,
         sentCount: 0,
@@ -380,12 +381,14 @@ async function publicRoutes(app: FastifyInstance): Promise<void> {
     await repo.updateInAppMessageStatus(id, userId, 'read');
 
     // Record read receipt
-    await repo.recordReadReceipt(message.broadcastId, userId, productId, 'read');
+    const recorded = await repo.recordReadReceipt(message.broadcastId, userId, productId, 'read');
 
     // Update broadcast metrics
-    await repo.updateBroadcastMetrics(message.broadcastId, productId, {
-      openedCount: 1, // Will be incremented properly in real implementation
-    });
+    if (recorded) {
+      await repo.updateBroadcastMetrics(message.broadcastId, productId, {
+        openedCount: 1,
+      });
+    }
 
     return { success: true };
   });
@@ -401,11 +404,18 @@ async function publicRoutes(app: FastifyInstance): Promise<void> {
     if (!message) throw new NotFoundError('Message not found');
 
     await repo.updateInAppMessageStatus(id, userId, 'dismissed');
-    await repo.recordReadReceipt(message.broadcastId, userId, productId, 'dismiss');
+    const recorded = await repo.recordReadReceipt(
+      message.broadcastId,
+      userId,
+      productId,
+      'dismiss'
+    );
 
-    await repo.updateBroadcastMetrics(message.broadcastId, productId, {
-      dismissedCount: 1,
-    });
+    if (recorded) {
+      await repo.updateBroadcastMetrics(message.broadcastId, productId, {
+        dismissedCount: 1,
+      });
+    }
 
     return { success: true };
   });
@@ -420,11 +430,13 @@ async function publicRoutes(app: FastifyInstance): Promise<void> {
     const message = messages.find(m => m.id === id);
     if (!message) throw new NotFoundError('Message not found');
 
-    await repo.recordReadReceipt(message.broadcastId, userId, productId, 'click');
+    const recorded = await repo.recordReadReceipt(message.broadcastId, userId, productId, 'click');
 
-    await repo.updateBroadcastMetrics(message.broadcastId, productId, {
-      clickedCount: 1,
-    });
+    if (recorded) {
+      await repo.updateBroadcastMetrics(message.broadcastId, productId, {
+        clickedCount: 1,
+      });
+    }
 
     return { success: true, redirectUrl: message.ctaUrl };
   });
diff --git a/services/platform-service/src/modules/exports/routes.ts b/services/platform-service/src/modules/exports/routes.ts
index 46be5f25..1ccb02e4 100644
--- a/services/platform-service/src/modules/exports/routes.ts
+++ b/services/platform-service/src/modules/exports/routes.ts
@@ -64,7 +64,7 @@ export async function exportRoutes(app: FastifyInstance) {
     const log = req.log;
     process.nextTick(async () => {
       try {
-        await repo.updateExportJob({
+        const processingJob = await repo.updateExportJob({
           ...created,
           status: 'processing',
           startedAt: new Date().toISOString(),
@@ -73,7 +73,7 @@ export async function exportRoutes(app: FastifyInstance) {
         const serialized = created.format === 'json' ? JSON.stringify(rows, null, 2) : toCsv(rows);
         const fileName = `${created.type}-${access.productId}-${Date.now()}.${created.format}`;
         await repo.updateExportJob({
-          ...created,
+          ...processingJob,
           status: 'ready',
           data: serialized,
           rowCount: rows.length,