Since you were so helpful on my last post I have one more for you.
I’ve ran into this issue with rhino several times over the last week working where my surfaces start out fine and at some point the entire file (including new surfaces made) become computed through some strange triangulation of the surface. From a distance they look normal but as you zoom in they reveal some strange conditions. I have attached a screenshot to show you what I am talking about. I have actually found that when exported to an .stl to be 3D printed it actually begins to show up in the 3D prints indicating that it is not just a graphics error but the model is being calculated differently than normal surfaces.