This is what I am getting:
The booking window for your selected Resort(s) opens at 8:00 AM Eastern Time.
Please check availability once the booking window opens.
Then it says: 'Start a new search', or 'Close and refresh results'.
I closed out the window and started a new search. At very slightly after 8:00:00 I hit continue (2 nights available and I had selected them) and immediately got an error message - service unavailable - start a new search. It was already gone, off course. I won't bother trying again. I guess it's possible I was a nano second too early but it was definitely past 8:00.
The good news is I have a Boardwalk View for 4 nights and my first three nights are resort view (previous weekend (Fri, Sat and Sun.)
That was what I was trying to match for Mon, Tues, Wed and Thurs which is when I already have BW view.
Now I'm thinking I will upgrade myself to a 1 bedroom. I have plenty of points available. I also have the Beach Club room for afterwards for a few days.