Looks like the CC is back on 851.1875. Be sure you have all site frequencies programmed, you never know which one will be used for the CC. I always arrange site frequencies with the ones marked as CC listed at the top of the list, followed by the other frequencies.
I have also noticed that the talkgroups that are actually part of the city of OKC are P25II, while groups in Bethany, Warr Acres, Yukon, Mustang and some others are P25 Phase 1.