Nope did not misunderstand.

For mode 2, here are the controls (regardless whether it's a simulated heli or real heli.

The LEFT stick fore/aft movement should cause the heli to add power & pitch as the stick moves forward (in normal)
The LEFT stick left/right movement should cause the heli to YAW (nose left/right). It does this by varying the tail rotor thrust vector.

The RIGHT stick (cyclic) fore/aft movement should cause the helis nose to pitch down (fore stick) and up (aft stick)
The RIGHT stick (cyclic) left/right movement should cause the heli to roll left (left stick) or roll right (right stick).

What you said was you move the LEFT stick left (which should result in YAW nose left) and your (simulated) heli ROLLs to the left.

So what I said in my earlier response is still true. You have a Cyclic response when you give left T/R YAW command. I said you have some sort of channel mixup (servos assigned to wrong channel) or something.

If you have a cheap eCCPM only controller and the simulated heli is mCCPM, you will have odd cyclic/collective interaction. I can't see how the T/R commad could be interacting with roll unless, AGAIN, you have some channel/servo assignments cris-crossed or you have some sort of MODE 1 / MODE 2 crossmatch going.

This is simply guess work grasping at straws since you haven't said what kind of controller you have. There are a whole lot of controllers that have 2 sticks.

Until you give us more details, you will just have to settle with our "misunderstandings".

Good Luck,
d.tipton