Barry, @Get_Barried
The layer list of my last post is now even more confusing to me 
since solid_0_solid_0_face_12 is on the plane of symmetry. Shouldn’t that mean that it would never have any layering done to it ?
I even looked at all the control point of that face in Rhino and they are all at Y=0, so every part of that face should be at Y=0 and the plane of symmetry is Y=0…
Dale