Ok first thing you need to try is cleaningyour browser cache. Go to tools, Internet options and delete history and cookies. Then close your browser, reopen it and see if that fixes it. If it doesn't then your easiest fix would be to simply download Firefox and use that as a browser. It is a better browser anyway. Also since it is this site only try and report it to an admin. it may be something that they need to look into if it is happening to multiple users