diff --git a/resource/static/main.js b/resource/static/main.js
index f32acef..2aedffb 100644
--- a/resource/static/main.js
+++ b/resource/static/main.js
@@ -1,13 +1,7 @@
-/**
- * Converts a long string of bytes into a readable format e.g KB, MB, GB, TB, YB
- * 
- * @param {Int} num The number of bytes.
- */
 function readableBytes(bytes) {
     var i = Math.floor(Math.log(bytes) / Math.log(1024)),
         sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
-
-    return (bytes / Math.pow(1024, i)).toFixed(2) * 1 + ' ' + sizes[i];
+    return (bytes / Math.pow(1024, i)).toFixed(0) + ' ' + sizes[i];
 }
 
 const confirmBtn = $('.mini.confirm.modal .positive.button')
diff --git a/resource/template/common/footer.html b/resource/template/common/footer.html
index 60f9ffb..96322dd 100644
--- a/resource/template/common/footer.html
+++ b/resource/template/common/footer.html
@@ -9,7 +9,7 @@
 <script src="https://cdn.jsdelivr.net/npm/semantic-ui@2.4.1/dist/semantic.min.js"></script>
 <script src="/static/semantic-ui-alerts.min.js"></script>
 <script src="https://cdn.jsdelivr.net/npm/vue"></script>
-<script src="/static/main.js?v202012202118"></script>
+<script src="/static/main.js?v202012211616"></script>
 </body>
 
 </html>
diff --git a/resource/template/theme-default/home.html b/resource/template/theme-default/home.html
index 7318f34..18a9780 100644
--- a/resource/template/theme-default/home.html
+++ b/resource/template/theme-default/home.html
@@ -151,10 +151,13 @@
             },
             secondToDate(s) {
                 var d = Math.floor(s / 3600 / 24);
+                if (d > 0) {
+                    return d + "天"
+                }
                 var h = Math.floor(s / 3600 % 24);
-                var m = Math.floor((s / 60 % 60));
-                var s = Math.floor((s % 60));
-                return result = d + "天" + h + "小时" + m + "分钟" + s + "秒";
+                var m = Math.floor(s / 60 % 60);
+                var s = Math.floor(s % 60);
+                return h + ":" + ("0" + m).slice(-2) + ":" + ("0" + s).slice(-2);
             },
             formatTimestamp(t) {
                 return new Date(t * 1000).toLocaleString()
diff --git a/resource/template/theme-hotaru/home.html b/resource/template/theme-hotaru/home.html
index 81c7d86..d141eb1 100644
--- a/resource/template/theme-hotaru/home.html
+++ b/resource/template/theme-hotaru/home.html
@@ -48,8 +48,8 @@
                         <th>运行状态</th>
                         <th>节点名</th>
                         <th>系统</th>
-                        <th>服务器位置</th>
-                        <th>在线时间</th>
+                        <th>位置</th>
+                        <th>在线</th>
                         <th>网络(B/s) ↓|↑</th>
                         <th>流量(B) ↓|↑</th>
                         <th>CPU</th>
@@ -200,8 +200,7 @@
                 readableBytes(bytes) {
                     var i = Math.floor(Math.log(bytes) / Math.log(1024)),
                         sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
-
-                    return (bytes / Math.pow(1024, i)).toFixed(2) * 1 + ' ' + sizes[i];
+                    return (bytes / Math.pow(1024, i)).toFixed(0) + ' ' + sizes[i];
                 },
                 troggleDarkMode() {
                     const hour = new Date(Date.now()).getHours()
@@ -211,10 +210,13 @@
                 },
                 secondToDate(s) {
                     var d = Math.floor(s / 3600 / 24);
+                    if (d > 0) {
+                        return d + "天"
+                    }
                     var h = Math.floor(s / 3600 % 24);
-                    var m = Math.floor((s / 60 % 60));
-                    var s = Math.floor((s % 60));
-                    return result = d + "天" + h + "小时" + m + "分钟" + s + "秒";
+                    var m = Math.floor(s / 60 % 60);
+                    var s = Math.floor(s % 60);
+                    return h + ":" + ("0" + m).slice(-2) + ":" + ("0" + s).slice(-2);
                 },
                 formatTimestamp(t) {
                     return new Date(t * 1000).toLocaleString()
diff --git a/service/alertmanager/alertmanager.go b/service/alertmanager/alertmanager.go
index fd603a7..7d611cc 100644
--- a/service/alertmanager/alertmanager.go
+++ b/service/alertmanager/alertmanager.go
@@ -30,17 +30,19 @@ type NotificationHistory struct {
 
 func Start() {
 	alertsStore = make(map[uint64]map[uint64][][]interface{})
+	notificationsLock.Lock()
+	if err := dao.DB.Find(&notifications).Error; err != nil {
+		panic(err)
+	}
+	notificationsLock.Unlock()
 	alertsLock.Lock()
 	if err := dao.DB.Find(&alerts).Error; err != nil {
 		panic(err)
 	}
-	if err := dao.DB.Find(&notifications).Error; err != nil {
-		panic(err)
-	}
-	alertsLock.Unlock()
 	for i := 0; i < len(alerts); i++ {
 		alertsStore[alerts[i].ID] = make(map[uint64][][]interface{})
 	}
+	alertsLock.Unlock()
 
 	time.Sleep(time.Second * 10)
 	go checkStatus()
@@ -50,11 +52,16 @@ func OnRefreshOrAddAlert(alert model.AlertRule) {
 	alertsLock.Lock()
 	defer alertsLock.Unlock()
 	delete(alertsStore, alert.ID)
+	var isEdit bool
 	for i := 0; i < len(alerts); i++ {
 		if alerts[i].ID == alert.ID {
 			alerts[i] = alert
+			isEdit = true
 		}
 	}
+	if !isEdit {
+		alerts = append(alerts, alert)
+	}
 	alertsStore[alert.ID] = make(map[uint64][][]interface{})
 }
 
@@ -72,11 +79,16 @@ func OnDeleteAlert(id uint64) {
 func OnRefreshOrAddNotification(n model.Notification) {
 	notificationsLock.Lock()
 	defer notificationsLock.Unlock()
+	var isEdit bool
 	for i := 0; i < len(notifications); i++ {
 		if notifications[i].ID == n.ID {
 			notifications[i] = n
+			isEdit = true
 		}
 	}
+	if !isEdit {
+		notifications = append(notifications, n)
+	}
 }
 
 func OnDeleteNotification(id uint64) {