As for the normals this effect mostly surface creation like filleting and surface Flowline. Most of the basic surface paths like Parriall you will not have mastercam have an issue with surface normals.
In the older days like V6 this was a big problem.
I will look at your file later as it is off to the office time.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Cadcam
Software and hardware sales, contract Programming and Consultant , Cad-Cam Instructor .