This is a common issue for all instructors. Can’t fix everything you see at the same time.Curious only do to your limited experience. But not unique. I experienced numerous instances where people would say or think "That must be OK because General Choi did not correct it. " I may have thought the same initially but later realized he had a certain amount of material to get through and if he tried to fix everything we would never finish. I came to realize he "Put out the hottest fires first" and at successive course where performance seemed to improve across the board details covered became more intricate.