i would not be surprised if hussie was deliberately inconsistent in the troll lips thing just to fuck with us. but most likely he just made a mistake. he is incredibly meticulous with details most of the time, (sasachres text being described as being able to crush a cat in the first act, that coming true after roxys introduction, for example) but in terms of making a joke or being plot important accidentally being inconsistent with troll lips is a mistake that hussie wouldnt be too worried about
Interesting theory
~Mod T