The following layouts caused the 6 tile gen mode to cause problems:   This works fine with the 12 tile gen, but 6 tile gen gives very strange results. In the case of the first one, the result is as shown below. <img width="692" alt="screen shot 2017-02-13 at 10 17 33 pm" src="https://cloud.githubusercontent.com/assets/20780097/22913686/4a05af50-f23a-11e6-976d-6066656b625c.png">
The following layouts caused the 6 tile gen mode to cause problems:
This works fine with the 12 tile gen, but 6 tile gen gives very strange results. In the case of the first one, the result is as shown below.