I noticed earlier that it appeared my Chrome was submitting double comments, but because that didn't make sense, I refreshed and found the duplicate was gone. Since then, I've seen a few comments (especially on the front page) where someone thought that had edited-out a double-post, but because the second post wasn't real, they had actually removed the on-topic content from their only one.

Thought I'd throw that out there, in case not everyone had seen.

Refresh or reload and the second post should be gone.