My understanding is the Post operate as they Did before Except the Dispatch Is Coordinated at One Post For Each District, not always the District Headquarters. Example would Be District 1, Findlay is the headquarters but Dispatching is Done in Van Wert. The reason for this was the Van Wert post was being built when the MARC's system was being setup it was designed to handle dispatching for District 1, Even though the Distict HQ is Findlay.
In District 5 Hq is Piqua, and they do Dispatch from there.
I think the OP as I stated before is seeing Towers being used (TG) that he either didn't notice before or they may have been out of service for a while for upgrades.
Maybe this map in the wiki will help.
Ohio State Highway Patrol (OSP) (OH) - The RadioReference Wiki
Rick