Hummel, you have learned your first "band-aid." If you have a proper grip (2-Knuckles on top hand, thumb in lifeline of lower hand) and you go to a "professional" who changes your grip to solve a hook or a slice without reinforcing the fundamentals, seek help elsewhere. The first thing I do when someone comes to me for the first time with a directional problem is check their equipment (proper grip size, quick check of lie angle after a few balls) then we look at their setup (grip, setup, posture). Then I check their take-away and position at the top. Usually the problem is identified well before the downswing ever starts...