I believe those are the new posts that you have not read... so if you looked at a post and then someone comes along and posts something new on a thread it will be in parenthesis... I think that is it??? It should be on threads you have looked at. And then once you look at that thread again the number will go away...
Oh, that makes more sense then what I thought. I thought it meant someone posted something, and then came back and deleted it. lol. With all the numbers in negative, alot of people were changing their minds...lol Thanks.