There is a Bug with this Bug Report.
Trying to submit a bug within this bug report produces an error. However after refreshing the page you will see that it did actually submit the post. So the error message screen is not accurate.
The UserVoice support claims it is fixed now. So far no more new duplicates noticed, but please do comment if you still get them. We try to track and merge all of them.
Chad, it seems like the problem is solved. Thanks for making a push!
That can explain a huge amount of duplicates we are having here sometimes. Logging this at Uservoice’s Uservoice: