I use Outlook for Mac 2012.   When I click a message in my Inbox, then click delete, the highlight jumps to the next message but does not delete.  OR, a prompt comes up asking if I want to permanently delete this message--then I click OK, and sometimes it deletes, sometimes not.  I often have to click it twice.  I used to be able to just click delete and delete all the messages I want one after the other.  How can I solve this frustrating problem?