Because I've seen examiners evaluating to the same PTS have different definitions of "minor deviations" and "rapid corrections".
And during my "pre check" I had the Fed want to rewind the sim 4 times, not because I didn't do the circle to land properly, but he wanted to see what exactly I was using as a visual reference.
It was kind of unnerving.. Didn't know if I was doing it wrong, or if he was just curious.