Hey, @mitu, here is the photo that came up with the USB devices.IMG_2163.jpeg .
As to P1/P2 controllers, I configured only P1 and that did the trick for both.
As I'm writing this I realized my mistake and am horribly embarrassed! I just realized that "X" refers to button "X" and not keyboard "X". I reset my controls again to see which is "X" (I think in terms of Buttons A, B, C, etc.), and now I've been able to get into the menu and reconfigure. Problem solved. I really appreciate all the help!