Hm, I see... I did slip too easily over all those details

(it surprises me every day again how detailed readers you are... and I always thought I was good at remembering and finding details in texts

)
About QB not being a snake, this would be my explanation: there seems to be a soletaken witch in him that used to be a snake, so he possesses the soletaken magic, but maybe it's the magic itself that chooses what form he will vere into (a bit like the turning into animal form in the harry potter series... the magic is the same, it's just the form you get that differs). So that witch was a snake, but maybe a wolf idd would suit QB's real soul better (the voodoo thing, when he imagined his family as sheep and himself as a wolf actually convinced me... I loved that scene in the book and always thought it had more in it than I actually grasped

)
Now, why then the capitals in Desert Snake? Maybe those people (the witch and in the earth elemental place) smelled the soul that was a soletaken snake, and smelled the snake... I don't know... many stuff in those books are just too vague to actually make sense of
I do also think though that even when alot of metaphores can be made real in fantasy, not all metaphores are actually real... so some metaphores are still metaphores