Most likely they don't have 1 room available for 3 nights. They have three different rooms available for 1 night each. I'd book them all and keep trying to get all the nights under one reservation. If it doesn't happen, there's no guarantee that you can keep the same room for all three nights, but they will try their hardest.
Call! I found the same thing for next November, over a year in advance, at the Poly. The 7 nights I wanted weren't available but each night was. I called, CM could only see the same thing. BUT he was able to call guest services and they overrode it. Plan for a longer phone call - between hold times, the CM having to check each night, and the hold while they contact guest services. But it will be worth it if they can book you what you want!!
When we were booking AKL they had a 10 night open with standard view, but not a 6 night. I was flabbergasted. (Starting the night we checked in, but not checking out for 4 more days)
My booking agent ended up on hold forever to speak with a supervisor who could book the 10 night and drop it down to 6. It was so confusing.
This happened to us in October. I had been trying to get our reservation changed from a club level room (which was the only room available when I booked) to a standard room. I had been trying for months and finally saw it, but it was only available as each night individually. I tried calling, but the wait time was more than 60 minutes, and I was afraid the room could get away from me. So I went ahead and booked it and then called. The CM who answered wasn't able to combine the two nights, but she put me through to guest services who combined it into one reservation for me. It was a lengthy phone call to get it straightened out, but I'm glad we did!Call! I found the same thing for next November, over a year in advance, at the Poly. The 7 nights I wanted weren't available but each night was. I called, CM could only see the same thing. BUT he was able to call guest services and they overrode it. Plan for a longer phone call - between hold times, the CM having to check each night, and the hold while they contact guest services. But it will be worth it if they can book you what you want!!
Most likely they don't have 1 room available for 3 nights. They have three different rooms available for 1 night each. I'd book them all and keep trying to get all the nights under one reservation. If it doesn't happen, there's no guarantee that you can keep the same room for all three nights, but they will try their hardest.