That's because a "stuck right" is simply pedal position with centered pedals as a reference. Centered pedals are not the zero thrust position of the tail rotor. If you want to know the zero thrust position it will roughly be the right pedal applied to keep the nose straight when you close the throttle to initiate a hovering auto (not scientific, but close).
That does make sense to me I just had a hard time getting it in my head that we spin as quickly as we do but like you said the pedals are not at zero pitch when they are centered so there is the extra force that spins us faster than what I would have imagined