Did you mean to reply in this thread? Though that does sound like a problem, I have no ranches and did not build my city on top of one. This is a screenshot of the fortress tile and that guy is flying. He's 10-20ft higher than the top of the fortress tower.
The flying guy is flying above a ranch...
I think
Either that or I am missing something, only had 1 game with the ranch problem, so didn't want to post an official bug with it.
Was just trying to give food for thought, sorry if you don't agree, do you still have the save?
Sincerely
~ Kongdej