Thoughts from last week:
a) When they finally started the queue (which was about 9:00 even though APs were supposed to go on sale no sooner than 6:00), everybody's status bar said "recalculating" and then started giving us a time.
b) There was a time (before they started the queue) when you could add a pass to your cart but could not check out. It said you could remove the pass, or try again later. One person posted that they did not remove the pass; they made a note of the cart number. They were able to get through by phone, provide the cart number, and pay over the phone.
c) People were reporting that there was a limit on the number of gift cards you could use to purchase online. I vaguely recall that it might be two, but I'm not sure about that.
d) The only people who could buy last week were DVC members. If you were a DVC member and logged in, you could see the sorcerer's pass. If you were not logged in or you were not a DVC member, you would not see the sorcerer's pass. So if some random person is saying things are sold out, maybe they are not seeing all available options because they are not an eligible person who is logged in, and thus they wrongly conclude that some options are not available. (Sorcerer's pass is for FL residents and DVC members only.)