I had something sent to me priority......and the tracking system kept telling me it hadn't been sent by the sender yet!!!! One day, 4 days or so after it was to have been sent, I wrote the sender and asked why she hadn't sent it. Left the house, went by the mailbox and it was there! Later in the when I got home, I checked and the tracking system STILL said it hadn't been sent. And they wonder why the PO has problems, eh!