-28 Open Tiles to Build?
So I was just looking at my main city and it says I have -28 open tiles to build on yet I can continue building. My second city is half as built up; says 0 tiles, and cannot build anymore buildings. Any ideas? I really think this whole city building limit needs to be better explained...cuz I'm at a loss. I am most definitely not at the 50 buildings limit on city #2 and not within 5 tiles of enemy city, or even my own cities. No mountains, hills or anything near city 2. (I have built on top of mountains on city 1 to squash the theory you cant)
Does the fact that both of my cities influence have apparently "merged" together make a difference? The borders of each have disappeared and turned into 1 giant kingdom.