So booking on points, I looked into a hotel that didn't seem to offer the points rate for rooms with two double beds. I called the MR line and inquired. They contacted the hotel and the hotel agreed to book the room on points with two double beds. My confirmation email specified this when I received it and it appeared in my online account up until the morning of check-in. I looked about 10am and the room type had changed to a king/queen room. Since I was checking in at 4pm I contacted the hotel through the "Rooms controller".

The RC insisted that "My request for a double room" could not be honored as they had a number of bookings recently that specifically booked that room.
I said that I also had a confirmed booking, but the line that came back was "your request can unfortunately not be honored".
I went back and forth a couple of times saying how the booking was a double-bed room until the morning of check-in and the martially modified line was, "Your request for an "upgrade" can't be honored, sorry."
After a few more back and forths, the RC acquiesced saying she would grant me this special upgrade. So all of the sudden the room was available. I wasn't really looking for any favors as a MR Plat, just the room I had booked months prior and was in my reservation. Sharing a bed was not really an option.

So if you book on points a double room that months prior wasn't available and MR books it for you (with confirmation email indicating room type) is that not a valid booking? The RC seemed very sure of this.

In any event, it made for an unpleasant arrival day for a vacation booking thanks to RC.
Thanks, V