One thing that I have noticed with this last batch of reservations (yes, this will be my third iteration thru the COVID crisis) is that my split stay is being handled as two separate reservations. It's happened with dining reservations...at least the few that are available so far..., it's happened with magic bands, and online check-in. While I'm still holding out hope that APHs with onsite resort stays are able to book park reservations for the entire trip, I'm convinced that the window will only open up to coincide with each individual stay.