This could be frustrating, but I'm actually more amused by it than anything. The lighting was so bad, and I tried to cover such a large area that I'm not surprised that it had problems. It does seem to have connected all the skylines of the mountains together, which has not worked in some of my other Synths. Unfortunately, in this case I was going for all the smaller hills in the middle, and it seems to have randomly connected them.
I'll revisit this spot sometime when I can get there with better lighting. It's really a very interesting area, terrain-wise. But I might not be able to get to it until Spring.