Sorry Hangingon, your first post kind of gave me a headache!
What's the rudder question you're asking? Are you referring to the OP's first post comment: "because when I use the rudder it will move in the direction it was leaning before I added rudder."? I was under the impression his biggest concern was the lean of the main rotor. Like much of what I know about aerodynamics, I learned from (possibly?) way too much reading about stuff. So here's my book learned take on the matter. Heli's are really complicated things, with a lot of complicated forces all happening at once, which all have to be taken into account either in things designed into it, or by the pilot.
Like Jetplaneflyer already mentioned, a side effect of the tail rotor's thrust is it will push the whole heli sideways as well as countering the main rotor's torque, hence the main rotor leaning against the tail rotor's thrust in a hover. One thing I read was it was common for heli pilots to respond to another's 'How's it?' with 'Left skid low', I guess implying all's normal as in a normal hover for a heli that leans left in hover. (I think US heli's rotors go one direction, and European another, I don't know off-hand. Why can't we all just get along?)
So imagine if you give right or left yaw input, which increases or decreases the tail rotor thrust, then some cyclic left or right to correct for it would be necessary. Although a little heli like the MSR kind of wanders about some anyway due to control slop, any little wind draft, etc., so I think it would hard to really experience that with it.
So I think only your Mini Titan is a standard heli, with one main and one tail rotor? The rest are with 2 counter-rotating rotors? So of course only the Mini Titan would experience this. One of the advantages of counter-rotating main rotors.
Also, i think the OP is done with this already, since he hasn't posted back, and maybe he was inexperienced and the heli really wasn't doing anything strange, just the inexperience coming through? Maybe I've been ranting for nothing?