So I'm just curious, since I'm swapping new springs onto my front Konis right now. Do the M3 springs and dampers not have as much of an oblong? From looking at the spring perch on the Konis, the spring pad, and the shape of the coil I'm having a hard time seeing how it can work its way out of position.
Edit
I played around with them once assembled and there definitely is some wiggle when they aren't loaded. The setup I just took apart has done around 60k miles without shifting. Are you sure the upper mounts are moving freely?