they use a industry required din setting...i have the same thing happen, i'm a type 3 plus, 5'10" and 143 lbs, and i only get to 6.5, if you read the shop work to, they're not aloud to...that kinda makes you the dumb one...sorry, and for sizing how tall are you, there may be a reason they reccomend it, sometimes the skis surface area, will affect the size the reccomend, they tell us to do the same, like atomics, you can sell supershort because of how they make there skis, although i do tell people to go w/ a different length becuase of what they want to do, it just depends where you work, and what the teach you, as well as what the reps tell you at there clinics