Are you completely certain the magnet isn't having any effect at all?  From your screens it looks to me like you want to pull the bottoms of the bangs away from the face, to fix that clipping problem - the ends of the bangs are near the bottom of the mag zone though, and the falloff settings and the amount of movement you have put on the magnet may not be enough to actually move the ends too much.  The high part of the forehead actually does look pulled out to me.  What happens if you move the magnet to something like Z: 10 or 20?

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