That was exactly the cause of the confusion. And the refusal of some to acknowledge that VRS and SWP are different.
In answer to your question about the R22 lateral trim - I believe it is to help with Inflow Roll (roll towards the advancing side) - usually perceived as being purely a low speed phenomenon but present in smaller measure throughout forward flight. The airflow entering the front of the disc has a different inflow angle to the air entering the rear of the disc (more time travelling across the disc to be affected by it) creating an inequality of lift between front and rear and resulting in a right roll tendency.
I'm not going to get into that argument again. I'll only say that it seems rather stubborn to hold onto a term that clearly has multiple definitions of which no one can agree on which is the "one true definition". Which is why I am with the FAA and Robinson in that I simply no longer use the term anymore.
So, if you have a hard landing despite still having a fully functional running engine, it is because,...
1) You entered VRS
2) You came in hot and waited too long to put on the breaks
3) You're too heavy to do what you are trying to do
4) You're in a tailwind and simply using the wrong technique
5) You are overpitching
As for the rt trim nob? Its to alleviate right cyclic pressure countering a left roll tendency. What you are describing is Transverse Flow Effect. Besides, the rt trim knob is used primarily in cruise, not low speed flight.