diff --git a/src/app/api/cron/route.ts b/src/app/api/cron/route.ts
index 6974bda..1c39493 100644
--- a/src/app/api/cron/route.ts
+++ b/src/app/api/cron/route.ts
@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server'
 import { requireRole } from '@/lib/auth'
 import { config } from '@/lib/config'
 import { logger } from '@/lib/logger'
-import fs from 'node:fs'
+import { readFile, writeFile } from 'node:fs/promises'
 import path from 'node:path'
 
 interface CronJob {
@@ -72,22 +72,22 @@ function getCronFilePath(): string {
   return path.join(openclawHome, 'cron', 'jobs.json')
 }
 
-function loadCronFile(): OpenClawCronFile | null {
+async function loadCronFile(): Promise<OpenClawCronFile | null> {
   const filePath = getCronFilePath()
   if (!filePath) return null
   try {
-    const raw = fs.readFileSync(filePath, 'utf-8')
+    const raw = await readFile(filePath, 'utf-8')
     return JSON.parse(raw)
   } catch {
     return null
   }
 }
 
-function saveCronFile(data: OpenClawCronFile): boolean {
+async function saveCronFile(data: OpenClawCronFile): Promise<boolean> {
   const filePath = getCronFilePath()
   if (!filePath) return false
   try {
-    fs.writeFileSync(filePath, JSON.stringify(data, null, 2))
+    await writeFile(filePath, JSON.stringify(data, null, 2))
     return true
   } catch (err) {
     logger.error({ err }, 'Failed to write cron file')
@@ -95,6 +95,18 @@ function saveCronFile(data: OpenClawCronFile): boolean {
   }
 }
 
+/** Deduplicate jobs by name — keep the latest (by createdAtMs) per unique name */
+function deduplicateJobs(jobs: OpenClawCronJob[]): OpenClawCronJob[] {
+  const latest = new Map<string, OpenClawCronJob>()
+  for (const job of jobs) {
+    const existing = latest.get(job.name)
+    if (!existing || (job.createdAtMs ?? 0) > (existing.createdAtMs ?? 0)) {
+      latest.set(job.name, job)
+    }
+  }
+  return [...latest.values()]
+}
+
 function mapLastStatus(status?: string): 'success' | 'error' | 'running' | undefined {
   if (!status) return undefined
   const s = status.toLowerCase()
@@ -140,12 +152,12 @@ export async function GET(request: NextRequest) {
     const action = searchParams.get('action')
 
     if (action === 'list') {
-      const cronFile = loadCronFile()
+      const cronFile = await loadCronFile()
       if (!cronFile || !cronFile.jobs) {
         return NextResponse.json({ jobs: [] })
       }
 
-      const jobs = cronFile.jobs.map(mapOpenClawJob)
+      const jobs = deduplicateJobs(cronFile.jobs).map(mapOpenClawJob)
       return NextResponse.json({ jobs })
     }
 
@@ -156,7 +168,7 @@ export async function GET(request: NextRequest) {
       }
 
       // Find the job to get its state info
-      const cronFile = loadCronFile()
+      const cronFile = await loadCronFile()
       const job = cronFile?.jobs.find(j => j.id === jobId || j.name === jobId)
 
       const logs: Array<{ timestamp: number; message: string; level: string }> = []
@@ -209,7 +221,7 @@ export async function POST(request: NextRequest) {
         return NextResponse.json({ error: 'Job ID or name required' }, { status: 400 })
       }
 
-      const cronFile = loadCronFile()
+      const cronFile = await loadCronFile()
       if (!cronFile) {
         return NextResponse.json({ error: 'Cron file not found' }, { status: 404 })
       }
@@ -222,7 +234,7 @@ export async function POST(request: NextRequest) {
       job.enabled = !job.enabled
       job.updatedAtMs = Date.now()
 
-      if (!saveCronFile(cronFile)) {
+      if (!(await saveCronFile(cronFile))) {
         return NextResponse.json({ error: 'Failed to save cron file' }, { status: 500 })
       }
 
@@ -242,7 +254,7 @@ export async function POST(request: NextRequest) {
         )
       }
 
-      const cronFile = loadCronFile()
+      const cronFile = await loadCronFile()
       const job = cronFile?.jobs.find(j => j.id === id || j.name === id)
       if (!job) {
         return NextResponse.json({ error: 'Job not found' }, { status: 404 })
@@ -276,7 +288,7 @@ export async function POST(request: NextRequest) {
         return NextResponse.json({ error: 'Job ID or name required' }, { status: 400 })
       }
 
-      const cronFile = loadCronFile()
+      const cronFile = await loadCronFile()
       if (!cronFile) {
         return NextResponse.json({ error: 'Cron file not found' }, { status: 404 })
       }
@@ -288,7 +300,7 @@ export async function POST(request: NextRequest) {
 
       cronFile.jobs.splice(idx, 1)
 
-      if (!saveCronFile(cronFile)) {
+      if (!(await saveCronFile(cronFile))) {
         return NextResponse.json({ error: 'Failed to save cron file' }, { status: 500 })
       }
 
@@ -305,7 +317,10 @@ export async function POST(request: NextRequest) {
         )
       }
 
-      const cronFile = loadCronFile() || { version: 1, jobs: [] }
+      const cronFile = (await loadCronFile()) || { version: 1, jobs: [] }
+
+      // Prevent duplicates: remove existing jobs with the same name
+      cronFile.jobs = cronFile.jobs.filter(j => j.name !== name)
 
       const newJob: OpenClawCronJob = {
         id: `mc-${Date.now().toString(36)}`,
@@ -330,7 +345,7 @@ export async function POST(request: NextRequest) {
 
       cronFile.jobs.push(newJob)
 
-      if (!saveCronFile(cronFile)) {
+      if (!(await saveCronFile(cronFile))) {
         return NextResponse.json({ error: 'Failed to save cron file' }, { status: 500 })
       }
 
diff --git a/src/components/layout/live-feed.tsx b/src/components/layout/live-feed.tsx
index d56f5b8..4962739 100644
--- a/src/components/layout/live-feed.tsx
+++ b/src/components/layout/live-feed.tsx
@@ -10,7 +10,7 @@ export function LiveFeed() {
   // Combine logs and activities into a unified feed
   const feedItems = [
     ...logs.slice(0, 30).map(log => ({
-      id: log.id,
+      id: `log-${log.id}`,
       type: 'log' as const,
       level: log.level,
       message: log.message,
diff --git a/src/lib/websocket.ts b/src/lib/websocket.ts
index 67a3934..53b86d1 100644
--- a/src/lib/websocket.ts
+++ b/src/lib/websocket.ts
@@ -415,7 +415,8 @@ export function useWebSocket() {
         // Auto-reconnect logic with exponential backoff (uses ref to avoid stale closure)
         const attempts = reconnectAttemptsRef.current
         if (attempts < maxReconnectAttempts) {
-          const timeout = Math.min(Math.pow(2, attempts) * 1000, 30000)
+          const base = Math.min(Math.pow(2, attempts) * 1000, 30000)
+          const timeout = Math.round(base + Math.random() * base * 0.5)
           console.log(`Reconnecting in ${timeout}ms... (attempt ${attempts + 1}/${maxReconnectAttempts})`)
 
           reconnectAttemptsRef.current = attempts + 1