It sounds to me like there is a rule in place that dictates the movements of these e-mails. It also sounds to me like there is a bug in that rule that would cause them to be placed in that folder as unread. I suggest taking another look and the rules running and you’ll probably find the solution. You can find the “Rules” under the “Tool” in the main menu bar. Depending on the version of outlook, it might say “Rules Wizard,” “Rules Manager,” “Rules,” or something similar.