Sometimes when I double tap in the negative Z, I get positive Z.

Sometimes when I double tap in one axis I will get another axis.

If you try the sketch (attached)
8ms flash every 3 sec is a heartbeat
1.5 sec solid led means BMA250 says it is -Z double tap
1.5 sec rapidly flash led means +X, -X, +Z (actually +Z has .5 sec solid before the flashing)
3 slow flashes is -Y
2 slow flashes is +Y

Appreciate ideas of how get more consistent results