Tracking USPS Signature Delivery mail- WTF???

I wouldn't call it smoke and mirrors, it's more of a case you actually see more info than you need to. Because you don't understand the logistics of how mail is processed,
But it's marketed that you can track your letter/item during and to its destination. when if I understand your sharing here we can only track an APC that contained our letter at least at one time while our letter maybe somewhere else taking its own route to the destination where its retracked on its final delivery?

That constitutes smoke and mirrors in my book, maybe bait and switch?