Coincidentally I'm having my first problem with USPS ever, I had a knife on the way to me and the tracking was updating regularly, and then all of a sudden stopped after "Departing sort facility" in Philadelphia. The estimated arrival date was on thursday, and it still hasn't arrived, and nor has there been any tracking updates.
I knew it was a matter of time before a package of my got lost
On 2 occations my knives arrive at Spokane, Wa and then headed to other parts of the States. One stopped updating when it arrived back East but was delivered tom several days later and one went to Texas and then updated it's way back to my PO.
Don't give up hope just yet.