You have the FAR rule right, and what we did was that we flew from point A to B (94nm) and B to C (104nm) for a total of 2h, so the question is whether "the original point of departure" has to be the point A, or do they just mean the initial airport the leg starts at, therefore point B... But what I was really curious about was if I could have them (my school) pay for that one flight if I have to do it again.