There are so many graphical anomalies in this game, don't get me started. I know OP, it's a super pain. I have a whole laundry list of these sort of building problems that keep me from building things I want to build because of stuff like this right here. I don't like to conform just so I don't have to see something. I don't give high fives to builders who put this stuff on the gallery though their buildings are beautiful and impressive. If I see this sort of stuff or roof overlapping inside I will not favor it etc. I'm a stickler for perfection in games when building something (I don't mean the player building it, but the graphic rules of how it should look and not have these sort of anomalies.