I was checking options for our trip (in case we wanted to change resorts), and I found the same thing. We'll be there over a Sat, Sun, and Mon night in early November. When I looked at just those nights, options were very limited and only at deluxes. I was curious and played around with dates a bit to see if things were really as booked as they looked. When I searched for a longer trip (I think I added Tues and Wed) I found availability at a good number of values and moderates. So technically there were open rooms, they just didn't want them to go for what was essentially a weekend-only reservation.