#88: "No record of this item" with USPS tracking number with Amazon shipping

Solved!

8c8186f40212c31d89c57e35d47927e3

I have a package shipping from Amazon using their SuperSaver shipping method. A USPS tracking number was issued, but using the USPS online package tracking system always reports "There is no record of this item". It has been several days, and still the Post...