Way to sort thread replies?

I havent run across anything on the forums about this... Is there a way to sort the actual replies to a thread?
Sometimes Im not sure if Ive commented on a thread before and I want to make sure I dont reply more than once. The problem is that as I go through the pages of replies, I will keep seeing the same replies come up; its like they come up randomly and I cant be sure Ive actually gone through all the replies.

Not having a static list makes it very difficult to make sure I dont double post.

Id appreciate if anyone has a suggestion for me.

Thanks!