Yes I'm seeing it happen daily now....it's usually the same people... I'm sure they are waiting for a screen to refresh or something...

I notice this too.

What's happening is that the user will click on the save button more than once either because they don't see the page refresh right away or because they clicked twice by accident.

I'd like to see the option of maybe having WPforo warn the user that they've already posted or have a set time between user posts (even 10 seconds is fine).