USPS Package delivery?

Question

I live in an apartment building that is literally attached to the local post office. I am supposed to receive a package, and the tracking says its "arrived at unit", so its at the post office, and it got there at 9 am. I know USPS delivers on Saturdays, but its almost 5 oclock, where's my package???? There isn't any mail at all in the mailbox.

Answer 1

No it would be in the manager's office.

I would check their if it wasn't at my front door.