Generally, I believe that all of your assumed answers to your questions are correct. However, at the top of my head, I know that Special Reserve Games's Gris received two print runs, with the second to be distributed roughly 18 months later. That being said, the second print run was not printed as a numbered set, unlike the initial print run. I'm sure that there are other instances of the items you're questioning having more than one assumed print run as well.