Yeah, it can do some 'odd' things so auto-build is definitely on most of the time. I have gone back to the drawing board multiple times (reset all wall types, delete roof, begin again) but every iteration I get closer and understand a little more on how the roofing/automation works! I am wondering if 'home designer pro' would help a lot here or not? I am assuming there are a lot more variables that can change, manual edits, and so on.