Well, again, the creators apparently like trolling us, and it's not just 2D, there's plenty of inconsistencies with the other backstories and such as well . . . like, is Murdoc green because he sold his soul to Satan in exchange for a bass guitar, or is it because he's actually a living rotting corpse who's been around since the dawn of time? (And if the latter, how would it be that his supposed canon age is in his mid-50s?) And even with 2D, is he possessed himself? Why do his eyes glow from time to time when they're supposed to be full of dried-out blood? Russel's eyes glow, and it's because he was once possessed by the ghost of his dead friend, so does that mean 2D is possessed?
Also, correct me if I'm wrong, but doesn't Kevin Bishop only voice 2D for interviews and "live" conversations?