Any idea why these roof pieces keep going up when I change the slope of the roof above?



They don't go back when I undo, and this happens even after turning cfe off

See recent downtopic thread entitled "Issues with cfe roofs".
To summarize: It depends from which corner you draw the roofs from that will either cause them to pop up or stay in place.

Thanks, that helped. In the centre instead of doing a 2x1 roof piece I did 2 1x1 pieces pulled out from the centre.