And just charge it to experience.

Your claim that he made an illegal U-turn will not hold water because they have a different rule here. Because it will show that you are on the wrong lane yourself.

When I took my driving classes here, the instructor told me that on a two-lane left turning section, the inner lane is primarily for those making a U-turn and the outer lane is for those turning left. So most drivers on the outer lane will anticipate that the one on the inner lane will make a U-turn. That is why my instructor's advise is if you are turning left, stay on the outer lane no matter how long the line on that lane.
This is also why on a road test you will fail if you go to the inner lane when the police tells you to turn left on a two-lane left turning section.
I guess you were exempted from a road test to get a license here.

His reaction is not that of a man in uniform but what can you do? Just forget and remember to stay on the correct lane next time.