Thanks! Although, I don't really go into the waffling details as much in that guide, as I was planning on going into it when I get to the "Checking for Authenticity Clues."
But yes, some pins do not have waffles running off the side of the edge. I think this is a sign of which particular factory produced a pin. One, may have them run off, another may stop. I don't think it's as people say "poor quality control" because I think it is intentional, by the way machinery is configured.
When borders first started showing up on pins, they were ugly and obvious. They were several millimeters wide and, I don't know quite how to explain, but they were a "high" point on the back of the pin. I think because the real pin was used to make a cast, and then the fake had this extra metal around the edge. While the ones shown in the image above, the border forms a "low" point, or is recessed in comparison to the top of the back. There used to be an old guide someone made with photos, but I can't find it anymore. I tried to avoid picking them up, so while I do have a couple I can take comparison shots to show a difference between that type of border, and the ones that happen on authentic pins, I'm not sure I can make an extensive guide, without getting my hands on more fakes. But these low borders, contrary to public belief, are not new. The Animation Art mystery set that was released in 2012 at Pin Trading Nights... they had these type of borders on some of the pins. Not that I'm sure anyone besides me remembers that. There's just never been a systematic list put together of which authentic pins have them, and which don't. So when people do encounter them, they freak out.