Just uninstalled and reinstalled app and still same issue. Also, sometimes when you open the app to look at the posts, and the exit the app, the live tile doesn't clear the counts either.
I recall some developer work during April after 8.1 dev preview launched and the app was updated to fix some tile problems. Looks like more work is needed.
By the way, even I you let I sit for a while, the counts still don't clear so not a lag issue.