Gaffer Tape said:

Wait... what? So he doesn't become Robin... but he was Robin the whole time? But he becomes Batman?

Can't you see how counter-intuitive that is? The movie is setting him up to be Batman but attaching the name of Robin to him. So, yes, you and I are apparently in agreement that he was very obviously set up to become Batman. CP3S didn't get that, though. Calling him Robin threw him for a loop (and rightfully so) because bringing up that name pulled him in a different direction simply by word association. And right above you, Warbler is saying that he could have become Nightwing or Red Robin. Would you have thought that, Warbler, that it's likely he would take on Robin-related aliases had he not been given the name Robin as a reference to the Robin character? (Granted, if he became Robin or Red Robin when his name is Robin, he must be an idiot, but that's beside the point) The point is is that if you don't get the reference, it pulls you out of the film, something a good in-joke shouldn't do. And if you do get it, it pulls you in a different direction than the film intends you to.

That he was Robin the whole time is a joke. His name is Robin, therefore throughout the movie he was Robin. Get it? It's just a joke.

I understand what your saying and I agree that it was a mistake. When I first saw it I thought it was a joke, but I do understand how people could be confused.