After getting the roof frame ready for the panels, I discovered the frame appeared to be "out of square." This caused the roof panels not to line up with some of the holes in the roof frame (rafters). Comparison of the construction information for the Costco version and the Sam's Club version show some descrepancies. The roof panels in the Costco version are held in place with bolts and small "clamps" where the roof panels join on the top and bottom. The Sam's Club version shows a small clamp at the top where the panels come together and a "clamp" bar on the bottom edge with no bolts going through the roof panel itself. This did answer one of my questions, but I still have the panel edge holes not lining up with the "rafter" holes. After some maneuvering, I was able to solve the problem.
This shows the holes in the bottom of the panel and the holes in the rafter.
This is what it looks like now that it is up.