I haven't thought of this till now, but my next trip has a room with 2 linked reservations (Sun through Fri nights). We added on the Friday night later, and now appear to have 2 separate reservation numbers. I believe the reservations are linked, but wonder if I will be able to book ADRs using the 90 + 10 day rule, or if I'll have to wait a few days to book my last night of ADRs. Has anybody else had experience with this?