1 New Messages = 0 Messages

It's actually been this way for awhile, but I always have  the notification on the right side and top of the page saying I have 1 new message, but there's never a message when I go to my mail.  It's been that way for about 8 months.  I just never really cared enough to post about it lol.  I just finally figured you'd like to know, incase someone else has the same problem.