Quoted from DeathHimself:
You know I cannot actually say in theory why it helped, but just from a guess I would say that by rotating the core a 1/4 of a turn actually changed the direction the magnetic field pulses and grabbed the ball just enough to change in path of SDTM. So I can't say for sure but maybe the density of the core has more of a pull to one side or another for some reason it that makes any sense.
However it did work for me and maybe will for a few others as well. No hurt in trying if it don't work for some just screw it back in the 1/4 of a turn towards it's original starting point so no harm no foul.
When you go to rotate the magnet, do you turn CW or CCW to make the adjustment?