Section View Material Assignment Issues

[Chopsaw]

Is there some sort of an issue assigning materials in section view ?  I am sure I have done this before successfully.  For me the fastest way to add a layer to a lintel is to just do it in a section view camera.  So copy the existing and move over with point to point and then resize by dragging to snap to the adjacent surface assign a new material from the library or plan materials and it all seems to work fine in a 3D camera view.

 

Then I was working on the next stage about 10 minutes later and noticed it was all fowled up.  Some materials went back to default but were not displaying as the default material and others claimed to be "Not Assigned" but were all displaying in a solid black rather than the chosen wood grain.