First, theres no requirement to come set the same way each time.
Second coming set the same way doesn't make an illegal move a legal move.
Third, theres no requirement that the free foot only move once during the "stretch"
Fourth, you cant always learn about balks by watching MLB. They call some stuff that (properly) should be let go in the levels most of us play / coach / umpire.
So, why do you think it's a balk? What provision of 8.05 is he violating?