THANK YOU! This seems to have worked. I had to go to Device Manager & uninstall the controller driver (and also check "delete this driver software from the computer" or else the Jmicron driver would load again.
After this, it appears the microsoft driver loaded and my DVD drive is reading/writing as it should.
Thanks to all for helping me figure it out. Not only because it solved my problem, but also because I'm OCD and this was bugging me so much!