It seems you're not using the traditional formula. Mind sharing?
(Also, did you use my first order or second? I'm guessing you used the one with Ni first.)
Edit: I think I figured out your formula. It wouldn't matter if you used my first or 2nd order. Here's what I think:
1)you rate N vs S and T vs. F, with differences at the beginning of the order weighed more heavily than differences at the end, narrowing down the middle two letters.
2)you rate the winner of N vs S against the winner of T vs F, narrowing it down to 2 types (for me, ENTP and INTJ)
3)out of the 4 functions for the middle two letters, you find the highest one, which chooses between the two leftover.
edit again: wait, no, that can't be it...kora's result wouldn't make sense. instead of step 2 above, you probably weigh the extroverted functions against the introverted ones to narrow down I/E, and then pick P/J from the first function direction you see.