I keep getting confused too, but let me just state what we got about a week ago. We checked in to the Poly on Friday night. We bought the Ultimate Pass for Sat, Sun, Monday, as we were checking out Tuesday at 6:15 am. We payed for a three day pass and got the DVC discount. So we stayed 4 nights, but payed for a three day pass. I don't know if this helps.
Good luck!
