I contacted support and they got me straightened out. Posting here on the off chance it benefits someone else. I had to delete the 5GHz CAP from the CAPsMAN interface list and then reprovision and it came right up. I am not sure if that is already documented somewhere, but I had not found it.

Hi all, I am having trouble properly configuring CAPsMAN. Setup is pretty basic. -RB5009 - Router and CAPsMAN. -RB4011 - CAP, conifgured as CAPs mode. Both running routerOS 7.1.1. The 2.4 GHz setup works fine, but whatever I have tried I cannot get the 5 GHz set up correctly. I have read many posts ...