Belive it or not, this is not so uncommon of an occurance. It happened to me and it's happened to a number of my friends. Each of these occured immediately after graduation from college... Send out tons of resume's, that's what happens, I guess.
The problem is that companies require your acceptance within a couple days of an interview. If you've interviewed at a couple of places in the past week, you could get several acceptances during that time. It would be "proper" to say that you're waiting on an acceptance from a "Better" job, but that wouldn't go over too well.
So, in the end you **** off one company and you look like an ***. I have no problem with that. Companies are out there to use you in order to make money. If I make a few of them stark raving mad, fine!
In your case, you did it to the SAME COMPANY! That's not cool. You're employed there, and you applied for transfer to two spots. I guess what's done is done, but don't expect too many raises in the next couple of years - you're on someone's black list, for sure. Pick your best spot, work it for a few years, then reassess your situation.