Which was answered in my first post
It wasn't.
This thread is about
Bankai Renji > Shikai Byakuya, not
Bankai Renji > Blut As Nodt.
2.2175 Exatons is what Byakuya was at before TLA.
First Invasion/TLA Shikai Byakuya > Hueco Mundo Shikai Byakuya = 2.2175 Exatons
Due to the lack of a solid number,
Blut As Nodt > Base As Nodt ~ First Invasion/TLA Shikai Byakuya > 2.2175 Exatons.
This thread is posing that
First Invasion/TLA Bankai Renji >= First Invasion/TLA Shikai Byakuya, which would put him at a number above 2.2175 Exatons, but that does not mean he would be stronger then As Nodt even without the stolen Bankai or Vol.
For all we know, Bankai Renji could be 1.2X Shikai Byakuya and Blut As Nodt 5X Shikai Byakuya, but without further knowledge, all we have is this:
Blut As Nodt >=<(idk they never fought) First Invasion/TLA Bankai Byakuya > Base As Nodt >=< (idk he's technically featless) First Invasion/TLA Bankai Renji >= First Invasion/TLA Shikai Byakuya > Hueco Mundo Shikai Byakuya = 2.2175 Exatons
(I could be a little off on this chain since I'm not great with these. Sorry about how poor this post looks)
Essentially, everyone here is scaling an unspecified number higher then Hueco Mundo Shikai Byakuya, and Shikai Renji not being able to hurt As Nodt has no relevence on whether or not Bankai Renji is stronger then Shikai Byakuya in First Invasion/TLA, and As Nodt is not being used to scale Bankai Renji either; rather, it is Byakuya's statements about Bankai Renji being stronger then him in Shikai during his fight with As Nodt that is being scaled and because the 2.2175 Exatons is from Byakuya's end and because Byakuya should have a decent understanding of Renji's strength at the time of the first invasion.
In short, it does not matter if Byakuya misjudged As Nodt's strength. All that would mean is that As Nodt would scale to an even higher unknown degree above 2.2175 Exatons. What is being judged is that
First Invasion/TLA Bankai Renji >= First Invasion/TLA Shikai Byakuya > Hueco Mundo Shikai Byakuya = 2.2175 Exatons. (Please correct me if I got any number or scaling wrong, but I think this is it?)
Side note: If anyone is wondering about the gigantic disparity between Renji's Shikai and Bankai if this passes, Renji currently scales a significant degree above that number, as it was where he was at during his first fight with Byakuya in the Soul Society Arc
7Kuroi. There just hasn't been any solid numbers for Renji since then, I'm assuming.