We are aware of a problem affecting some Pushover Android users where notifications are received twice, sometimes minutes apart. This problem appears to have started earlier this week.
This problem is not with the Pushover service directly, but is with Google’s notification servers and is also affecting some other Android applications using Google’s push service.
If Google does not resolve the problem soon, we will work around it by publishing an update to our Android app that suppresses these duplicate notifications. We apologize for the inconvenience.
We will update this post when we get more information.
Update (18:15 CST): We’ve released Pushover 1.6.2 for Android to work around Google’s problem. Users are encouraged to update and contact us if the duplicate message problem persists.