If you were "spastically" replying were you going faster than 1 every 20 seconds?
From the faq
"How often can I comment?
There is a 20 second wait time in between comments to limit spam."
I'd think there would be an error message saying to wait before posting again, but maybe that's were the bug is coming from.
Maybe that had some indirect affect??, . . . I did see that error a few times. BUT, in those instances, my comment didn't publish in a way I could see it right after (if that makes sense). I appreciate your comment, though.