So, I've been using Visio for a whole 2 days so if I'm being dumb feel free to tell me.
I built a stencil of a network device chassis. I put control points at the bottom of the shape horizontally where the screw holes are. I pinned the Y to 0. I then set the CP to outside since the racks CP's are set to inside. This worked, the stencil snapped slightly offset from the edge of the stencil right where my CP was. I then added more CPs inside the chassis where I wanted the inserts to attach. I set them to inside. After adding the internal CPs, None of them snapped anymore. The chassis reverted back to snapping at the edge of the stencil and the inserts don't snap at all.
Side question, how do I edit a master shape after closing the program and reopening it. I have been dragging it onto the screen then back to the left as a new stencil.