I tried to figure out what has happened here. Checking Campfire, it looks like there are three gyms in the L14 not counting that one, which is the max that can be created through Wayfarer:
Lakeside Fountain
Keighton Auditorium
Engineering and Science Learning Centre
I think that the edit made the status recalculate, and even if it were returned to the position on the north side of the line, there are three gyms already, so it won’t go back to gym status.
I know there can be a delay in what Campfire shows. Is that gym list accurate?