At a clinic last year, one of the instructors chided me because when I was in the "A" position and walking the line, I took two steps instead of one. He actually made a big deal out of it, stopping the drill we were doing and pulling me aside so that he could show everyone "the right way".
At another clinic, we were doing plate work. I set up with my eyes at the top of the strike zone. One instructor told me that I was setting up too low. Later that day, another instructor told me I was setting up too high!