THIS. Everything is moving slowly through the system and your phone won't likely actually ship out to you until tomorrow, possibly tomorrow evening/night.
FWIW, when I got my Apple Watch, it was the first time that I decided to try delivery to a UPS store, and the watch shipped out on the evening before it was supposed to arrive - NOTHING in the system before then, and then everything all at once. I put in the delivery request, got the exception and the big yellow change banner, and panicked. I was sure I'd just delayed delivery of my watch. I cancelled, and then it sat with the exception for a couple more hours. At that point I figured I was just being silly and re-entered the request, since I couldn't take next the day off to wait for the watch anyway. That was around midnight that night. When I woke up in the morning, everything was good in the MyChoice app, and I picked up my watch a few hours later.