"The fitter says that I compensated for the short pull with high dimensions."

I don't understand, and don't they use inches in TN? smile
Short pull = face more forward = effectively less DAC.
Full, round face with...uh...adipose tissue around the zygomatic arch (cheek bone) requires more cast and more drop.
Thick chest = effectively longer LOP = need shorter stock.

What is your shirt size? Did you shoot a try gun with those dimensions?