Unable to Affiliate with Institution

I have uploaded content for my username in Course Manager and I am able to say that I am part of an Institution, but it is a text box where I can type anything but it doesn't ever actually affiliate with the school. How do I remedy that?

In going to the Public Site Manager, I am not able to add the Apple ID for this user

Is the problem because that is the generic account I created to sign up for iTunesU?