Actually, I didn't click repeatedly when my posts were duplicated. On one of them I did cancel the post and re-do it though. That one posted three times.
This all started during this last round of screen changes to accommodate the additional pop-ups, wait, I mean to make the site more like other sites. Anyway, I don't think they have the server capacity they require. Maybe the additional ad revenue will be enough to upgrade. I hope so for admin's sake. This has got to be very unpleasant for them.