I actually had 4 reservations. When I did the first one...she was able to book into the second one...tried into the third and nothing was coming up for times so I stopped. I tried MS later that afternoon. Couldn't go beyond the 2nd reservation. Yesterday I had the last two reservations and expected it not to work again...I never told the CM I had two...she never asked and kept going until I had the last days of the trip. So, again I really made adrs for a split stay. Mine were linked too just like 2 and 3...didn't seem to matter.
A friend of mine tried this morning and they said no. Called back...no again and didn't try. Called again tonight knowing I had done two of mine and went through 3 reservation numbers without any issue. From what she could tell too there was nothing special the CM did. She did the full first 10 days of her stay.
I have no idea, but it seems unfair for split stays and it is a pain. I hope they figure this out before our next trip. It's confusing with check in and check out dates when to call.