Chrome扩展程序 - Chrome Alarm API会在创建每个新警报后重新安排所有警报

I have developed chrome extension named Reminder App in which i have used Alarm API which allow user to set alarm , App has two section To create single reminder (e.g at 10:20 AM) and to create multiple reminder (e.g Every 50 Mins) , when in packaged App (After Uploading to webstore) i set two reminder I have developed chrome extension named Reminde