I started to play around with the mesh again and I'm running into a lot of buggy behavior.
Amongst other things that have happened, this particular behavior is concerning. I created a 10000'x10000' mesh at zero level and off to the side I created a slab rectangle 30'x50'x20'-6" to simulate the size of a house against the large mesh. I then went to pull the slab over the mesh the slab was actually -6" under zero level but when I pulled the slab over it raised the slab up so the bottom of it was 0' and the top was 20'-6".
I was expecting a collision with an intersection but I got something different. Is that expected behavior? I need to know because this could really mess me up in the future if I'm not expecting it.