The FCC license info for this systems Tecumseh site is different than the OKWIN site. Different location and tower. It seems OUHSC was only on OKWIN temporarily as the system listed here seems to have traffic again in OKC.
There doesn't really seem to be any connection between the two systems except in the DB. I cannot get either control channel at home - maybe they have the same system ID, in which case they really are part of a network.
The question remains, why would OUHSC get on a different system when the state is already part of OKWIN (and OU/Norman is already there, too)?