Booking this flight got interesting.
I booked it on Saturday night, started just before midnight due to the events of the day.
If I priced it as a new flight, the flights showed up correctly. If I tried to do it as a change to use my credit, it kept trying to force me onto 11/3, which got in on the 4th.
Ended up calling the CP desk and got it booked. Only problem was, at that point it was after midnight so inside the 14 day advance purchase requirement. It went up another $50.
The CP agent thought it was interesting I was doing a MR, but when I said it was worth nearly 30k PQMs, he certainly understood why I'd do it.
Oh well, I guess that's what I get for waiting.