Not only this ^^^, but there is some serious weirdness in Disney's Online Booking. I was looking in October for 4 Nights and it was telling me the only options were Bay Lake Tower and Grand Floridian, which are both well outside my budget. But, if I tried searching for Night 1, Night 2, and Night 3-4 as separate stays, they suddenly had rooms to spare. If I searched for Nights 3 and 4 separately, no dice. If I tried Nights 2-4, again no dice. Even stranger is it suddenly showed availability if I extended my dates from 4 to 6 days, even though that was the same 4 days + 2 days extra. Some of this would make sense (one resort full on some nights and another full on others), except I found AS Movies on all 4 nights searching separately (1, 2, and 3-4), but it wasn't listed if I searched as a single stay.