this was discussed long ago and the wireless keypad does NOT work with the Ti with pushbutton start. Ford said so and dealers should know to tell you so when you try to order. It would have been quite handy to add a keypad to an obscure spot (inside the fuel door was discussed) as a sort of wireless "hide a key".
you can't lock your keyfob in the Ti regardless. it won't lock the door if it senses the fob inside the car, if it's in the trunk it will pop the trunk after you close it (try it, it's kind of neat).
you can either program the door touch to open all doors when you grab the driver's door, or grab any other door instead of the driver's door and it will unlock all 4. if you're walking up to the car from the rear, just grab the back drive's side door instead.