When entering the forum, everything is listed as normal, (last post date, descending order, all open topics). When you click on a topic and visit the corresponding thread and then return, using the browser back button, I get a different screen. The parameters are the same, but the list of pages is longer(usually 17 instead of 13) and although it still says I am on page one, all the topic post dates are from the middle of march. I manually cleared all the cookies and temp internet files, but it still happens. What might the problem be? [?]