Another update. Went to go figure out what was wrong with the backup camera today, and only had an idea about it after I closed everything up in the car and was taking a shower afterward. While I was troubleshooting, I did go ahead and reprogram some of the buttons on my steering wheel (I now have push-to-talk, aka, Siri) and installed the car's GPS antenna. It gets a good signal, even in the trunk.
CrzRsn was correct. It does now think my car is Australia. I think that means I get to drive on the other side of the road now.