. The number you are looking at could be a customs number. That number does get scanned occasionally but not all the time.
The item could be sitting in Canada Customs at present.
You do have 45 days in which to open a dispute with paypal.
I had never heard of postclubusa but looking at there website it appears they use a variety of delivery services.
Your item will probably be delivered by a private corrier company rather than the Post Office.