Cueing/Rega RP1w/Bias 2 cartridge

Experiment w different anti-skating force.

Should have said lower anti-skating.

Agree lower the antiskating. It is set too high, irregardless of the setting on the dial.
See what it does with the antiskating completely off, then add it ontil it only just barely starts to move sideways, but not more.
I would bet it will be fine like that.
Some folks dispise antiskating anyway. And If YOU cannot hear a difference, (One channel a bit louder than the other,) it really really does not matter.
(and it is not gonna hurt your LPs either)

Instead of lowering the anti skate just increase the skate.

I'm sure your dealer is right. A friend's P1 (also with Bias 2) does the same thing. That doesn't necessarily mean the antiskate is set too high, just that the cueing mechanism doesn't provide enough friction to keep the arm in place against the outward force exerted by the antiskate setting. FWIW, my friend set his antiskate to its minimum value so the cueing worked more accurately, and with no drop in sound quality or tracking ability.