Car sway left and steering easier to the left

Hi My car is Honda Accord G9 I have a persistent problem which has been bugging me for years. I live in Thailand where we drive on the left side. As a result, general roads are slightly tilted to the left to drain rain water. It's understandable that I need to resist steering wheel a bit to the right as it tends to steer left. However, on any road where it tilts to the right, mostly on expressway or inter-province highway with waterway as traffic divider, I don't need to resist steering wheel as much as the other way around. Sometime I don't need to hold steering wheel even with the road tilting to the right. Car has never been in heavy accident (only dents and scratches). Wheel alignment is in perfect condition (toe, camber, caster are in tolerance both front and rear). Most of the steering parts and suspension have been replaced (even the complete set of steering rack).

I'm thinking about wheel distance in the front left towards body center line which may not equal to the front right.

Any other ideas for me to check?