The default assigning of axis and buttons in AH is incomplete. You need to manually set up the stick, 
 for a help file on how to do it.
Usual mapping is:
X axis: analog input aileron (roll) 
Y axis: analog input elevator (pitch)
Z axis: analog input throttle1
Z rotation: analog input rudder (yaw) - this one is the twisty function.
If you have doubts about which axis on your stick is which, just move it (while in the controller setup menu) - the numbers in brackets will change for the respective axis when its being moved.