Polygon shapes are bad with v9s and v13

I've trained both of these models (v9s and v13) and the outputs from evalfscore are bad. The polygons are too large and encompass multiple buildings.
Any tips?

![image](https://user-images.githubusercontent.com/6499633/44497680-9d727d80-a62f-11e8-8f39-3c31a9f47f08.png)
![image](https://user-images.githubusercontent.com/6499633/44497716-c85cd180-a62f-11e8-9720-0b5dfbde3b6e.png)
