@cmb:
That's exactly what I said - the one with the xauth options is a mobile P1, the one without is a site to site P1. It's correct, you're trying to edit/create the wrong thing. Edit the mobile P1, or if you don't have one, go to the mobile clients tab and add one.
Ah I found it. Seems that you can only get to it from another option and it isn't directly available right from that menu. have to add mobile=true to the url if you wanted to access P1 mobile directly.