Okay, the 2nd test came up with a far more accurate appraisal. This time, though, it listed DFA as "ISFJ - Protector Guardian" 56% Introverted, 22% Sensing, 44% Feeling, 11% Judging. The overall description was closer also, but it still feels like the thing is off the mark a bit; perhaps an unavoidable flaw in a standardized test.
All in all, however, an entertaining diversion on a sunny Thursday afternoon when you're trapped in the office.