I hope this helps....We have a DVC stay Oct 19-25.
Plenty of availability at all parks. I kept checking once I had confirmed spots.
It shows grayed out, but it really isn't NOT available.
Keep trying. It will give you all sorts of error messages, but keep trying. My Magic Kingdom day was giving me Olaf errors, unavailable errors, all of it. On about the 6th try, it confirmed.
This is such a frustrating process. When I thought I did not have a park reservation, I went in and tried to make one and it showed that I had a confirmed reservation for that park.
Hang tough, all. We all know how insane this is.