I think what you mean is the Help Section, Am I right?. As far as I know. If the Moderator locked/closed the topic, After 2 or 3 days, Its automatically will be moved to Recycle Bin, . That's why. Maybe our Mod don't have a time to move the topics. They don't delete those topic cause that may be a good reference to the other users. The good thing is. Its locked. We just need to wait to be move to Bin,.