Well, tbh, the midpoint of Tori and Uke's heads is not (0, 0, 2.65), it's closer to (-1, 0.1, 2.65), I think. Don't take my word for it there though.
Yep. Tori and Uke are not centered in-game, as Suomynona said. Some people have noticed this while making mods, as the center value for Tori/Uke wasn't 0 but -1.