I think it applies to pretty much all teaching. I still get it with the dance lessons (oi! no sniggering at the back!), where the teacher explains how to do a particular step for the first time then, as we progress ,months or years later, you get "Well I said that was how to do it, but actually it should be done more like this, that's just the simpler explanation to start with" and now you have to not just learn how to do it correctly, but unlearn how to do it wrongly first! Gah!