Bear with me on this wall of text, but I think I can explain it.
When you're turning you're unloading lift from one side of the rotor disk whirring above you which will cause you to descend. If you're countering this, you are adding collective and the Huey will be inclined to laterally rotate clockwise (countered with left anti-torque pedal). If you then reduce collective (and RPM), the clockwise inclination will lessen causing you to laterally roll counter-clockwise if you haven't anticipated this (by reducing pressure on the torque pedal).
The main problem when you've moved from fixed wing to rotary is the ingrained response of using the pedals. There is no rudder, the pedals purely counter the torque produced by the main rotor. There are far more variables when it comes to flying a chopper.
Example: You're in an A10. You turn left, and you apply left rudder to create a smooth turn. Whether you are ascending or descending, adding power or reducing power makes no difference. You apply the pedal for the corresponding turn.
You're now in a Huey, and you are turning left with the cyclic. You didn't apply collective and you are now gradually descending. RPM has reduced, and the Huey which is dangling below the rotor starts to rotate counter-clockwise (albeit very slightly. Lower speeds will make this far more pronounced). This will cause you to use right pedal to counter that rotation.
You try a second turn to the left. This time you have anticipated the loss of lift on the left side of the rotor disc and have applied collective to maintain a level turn. As you increase the collective to stay level, RPM increases, as does the torque causing the Huey to rotate clockwise so you counter it with the left pedal.
I'm not sure what I've written has made any sense, but it's how I understand it.