When I started, I didn't change any USB settings on the phone because I thought this was a simple update by connecting to Kies like I've done before.
I've tried different USB ports. Odin shows a yellow port when I connect the phone to the computer. I have tried to enter recovery mode both while the phone was connected and disconnected, with no luck. I can potentially try on another computer in a little while.
I actually bought this phone in October 2011 directly from T-Mobile, so I believe it should be under warranty.
Do not worry about asking me too many questions. I completely understand the purpose behind it... to me, it's just a way for diagnosis, and a good diagnostician asks a lot of good questions. If anything, it increases my trust in you! Sorry for the late response, but I've been up all night trying to figure this out, and I had just fallen asleep!
-Shoob