I suspect everyone has put this one into the "too hard basket" - I know I have.
The problem is that one is a Release Zone under the "City" of Parks, State & National, and the other is a City itself with multiple release zones specified under it.
It is technically possible to do (though very time consuming) but the problem is that it would result in the loss of all the geographically specific details for the releases. And someone else in time would most likely add it in again as a City and we start again... ;-)
Although strictly not correct, my gut feeling is to leave things as they are. Personally I'm not prepared to change it.
Understood - and we appreciate the reports, otherwise we don't know what is out there needing a tidy up.
My response is only my opinion though, and others may think differently. Although I suppose if they had then someone would have done something by now. We were a bit remiss in leaving you 'hanging' and not answering at all . . . maybe everyone thought someone else would deal with it. 😉