My favorite is when it actually says "out for delivery" on the day it's supposed to arrive, never shows up, then changes to "could not be delivered" after not showing up.
I called FedEx last time this happened because the delivery was a firearm, and I needed to know what's happened. The person said it was loaded on a truck that morning, which triggered the status change to "out for delivery", but they didn't actually have anyone scheduled to drive the truck that day so it never even left the lot. It did arrive the next day, but I learned to not even trust "out for delivery" from them.
Awesome system, guys.
I love it when typos create new words that fit so well.