Just a word of caution about Columbia, because their policy concerning split undergrad is confusing...apparently even to them.
I was planning on applying ED and was going to be overseas at the time of submission, so I contacted them months in advance to make sure I had all my little ducks in a row. They replied to me via email that I only needed a Dean's Cert from my degree-granting university. I had that all set up and had everything in on time...then a month after I submitted my app they sent me an email saying that they hadn't received my Dean's Cert from the university I spent my freshman year. I explained to them the situation and sent them a copy of the email they sent me. It didn't matter to them that now I was overseas or that it was their mistake. They totally refused to consider it complete without the other Dean's Cert. In fact, they wouldn't even admit that it WAS a mistake, they just said it was a "misunderstanding." Excuse me, but the email just said in reply "Just your degree-granting institution." What was I supposed to have misunderstood? As you might suspect, I won't be at CLS in the fall.
Anyway, don't listen to anything they say, just get as many Dean's Certs as you can!