Just hung up with a rep. I've lost count of how many times I've spoken with them now

, but this last answer I got finally makes sense to me.
The rep (Crystal) said that if you have a # that starts with "00xxxxxx" your order was taken manually. She said that last night (this morning; midnight) they were having something called "Apple Down Time." She said that during this time, no orders were entered into the computer but that you still are assigned to that phone you ordered; you're still in front of the line for actual phone assignment, regardless of whether you got your email right away or haven't gotten it yet. She said that people who ordered this morning after around 8ish were getting EIP emails right away but a lot of their phones are back ordered, where that is
not the case for those of us who placed our orders as soon as we could around midnight. She said the email would come, no worries.
So I'm gonna enjoy the rest of my day and quit stressing.