In the wonderful way computers do, something somewhere is treating ZIPs as integers, and not strings. Therefore, instead of immediately noticing a missing digit, checking the state, and doing a most-likely-target lookup of ZIP codes, the system (or some dumbass with a barcode scanner, but probably the system) decided that it was looking at a number - a number for which a leading zero is "optional." And thus things went pear-shaped.
I still don't understand why they didn't check the state code as a sanity check on the ZIP code, but that's package delivery for ya. If they were rocket scientists, they'd work in another business.
So anyways, my stuff finally shows up: a breadboard, some voltage regular ICs, and the RCA composite video jacks. Problem is, the breadboard's pin pitch is too large for the stuff I'm working with (which I figured from the beginning, but it was worth a shot). It also didn't include the pack of assorted precut wires which was advertised in the spec sheet. Worse, the voltage regulators only supply 0.1A - not the 1.0A I need to be able to draw.
And that's how I wasted two weeks waiting for a package full of stuff I can't use.