Is it my IE or is it the servers?

Sometimes when I try to go back and read previous posts in a thread.....all the posts are gone or only the earliest ones are still there. Sometimes I try to read the last post in a thread and then try to go back and re-read some of the earlier posts and thay aren't there.

I have actually gone back to the "new posts" board and followed threads from the beginning and all the posts aren't there. I know because I have posted and others have replied.

It's almost like the servers are taking me back to where i was, instead of where i want to go.