Maybe I heard incorrectly but I thought that a few months ago, Disney changed the rules for Fastpass+ for split stays, in that each stay is treated separately for FP+ and you cannot make FP+ for the second reservation until 60 days out from it. That was apparently done because many were reserving split stays and using the first one to simply give a few extra days to start making FP+ reservations and then they would cancel (for full refund) the first reservation. The new process was reported as not applying to
DVC reservations, but in this situation, there is also a Disney hotel reservation involved.