Look at that thread again. Your posts are on two seperate pages. Look at page one, you will see the first post on that page shows your signature, the others after that on that page do not. Now go to page two and you will see that again the first post on that page shows your signature and the one following that does not. Your signature will show up the first post post shown on a page - if there's multiple pages on a thread and you have posts on each one of those pages it will show up on the first post by you on each page. Make sense now?