As long-timer readers should remember, I’m not very tolerant of sock puppetry in the comments.
Consequently the filters toss comments into a general queue for review if the username or e-mail don’t match-up to your previously approved comments under a different username/e-mail. And given the volume in the queue I may not get to them all, since that means I have to search through old comments and confirm its the same person. And make sure they aren’t playing games.
You can drop me a line if you feel that there is a problem, but be sure to let me know what username you are/have been using. It would also help if you could explain why you felt the need to change the name.