To me personally, the first two pages you posted are not a correct translation. The reason I believe this is because the idea that Madara was the second SO6P and Nagato the third makes no sense logically. We know for a fact that Madara is collecting the Biju's to complete his body, which means he has yet to achieve SO6P status. I mean why the heck would kishi heavily involve Madara in the story AFTER he achieved this status? It just wouldn't make sense to the story. Obviously he has not yet achieved that state and the whole point to the story right now is to see whether or not he will succeed.
Beyond that, we also know that Nagato was only an uzumaki and could not use techniques like Izangi because not only did he lack Uchiha DNA, but he also didn't have any sharingan to boot! There is no way Nagato was the third SO6P and again, there would be little point to knowing this after the fact anyway. All the evidence points to your translation being wrong and the 3 paths translation being right. That's what I think.