I'll play Devil's advocate here.
(Believe me, defending the USPS is not on my agenda, but previous rage episodes over their antics, have forced me to seek an alternative understanding of what they do/how they do it.)
I work for a company (disclosed) that has a massive corporate side, but all anyone sees is the retail side. Most people don't know that they are technically two separate companies, at least on paper.
The retail stores offer sales and technical support.
When people walk into the stores, they see a large number of employees, all wearing the same color/style of shirt. This can be confusing, because about 60% of the employees are tech support, and 40% are sales service. But there's no way to distinguish between the two, unless it's stated.
When customers walk into the stores, they have no idea how the operation works, and often times end up on the opposite side of what they intended to do. This sometimes leads to confusion and frustration.
***My point is:*** Some simple operations can be confusing from the customer stand point, even though they are as easy as "1,2,3" for the employees.
Maybe your package went to Tampa, because it was loaded onto a huge shipment that was labeled "General East Coast". The USPS first needed to get it to the East coast, before it could be sent north, to New York.
To the best of my knowledge, USPS shipments work like Über/Lyft taxis. They'll pick up what they can, when they're near something that needs a pickup.
It's very close to "swarm traffic" (which is the only name I've heard it called, so please feel free to correct me!)...there was a large shipment being gathered, in the area where your package originally departed. That large shipment was heading to the East coast. Granted, it was heading to Florida, but hey, at least your package caught the nearest/first available ride to the East coast. Once it was there, they can break it off into another shipment heading north, and probably make stops along the way. In fact, I'd be willing to bet that this second shipment went past you, and that your package was just a stop along the way.
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In closing, yes: the USPS sucks donkey dongs. But, there is a method to their madness that, while not blatantly obvious to the consumer, is as efficient as they can make it for themselves.
It's nice to imagine an ordered item being put on a truck, and sent directly to our general location, but that may not always be the easiest way to get it there. Sometimes, our small shipments, are just drops of water in a current in an ocean. They're along for the ride until they get closer to where they're going!
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Sorry for the rant(?) but you've become a neat part of my morning ritual (reading ECF), and you are obviously a cool person. I just wanted to set your mind at ease about shipments and what-not!