[whorleater]

I'll counter your anecdote with mine: in my undergrad years, I started out as a computer science major, and discovered that I wanted to do computational astrophysics 3 years into my college career, meaning that I lacked significant physics background. The Astronomy department was adamant on me "needing" to have done the basic physics classes (mechanics, E&M) before letting me into an introductory quantum physics class, even though I already possessed a working knowledge of the basics. I emailed the professor of the quantum physics class, explaining my situation, and simply ended up taking the quantum class alongside the basic physics classes.

Although I think your situation was pretty special as well, transferring universities is usually incredibly annoying and filled with road bumps. I've found there's a lot more leniency given to students who remain within the same university.