Sorry to bump an old topic, but I’m wondering if the issue here is not that the Good Reply badge was granted multiple times but that the notification for the badge was sent multiple times? This is an issue that’s come up a few times when handling support requests. It’s tricky to debug, but it seems that notifications for a badge will continue to be sent until one of the notifications is marked as read. If that is correct, does having a badge notification marked as read require the user to visit the badge’s page? That seems to be what’s happening here:
I could be totally off-base on this, but today is the second time I’ve tried to track down the cause of the issue.