PS3 controller same player

[tiagokihara]

I have a problem:
I configured a PS3 controller (bluetooth) on retropie, when I was to play, I figured out that the GPIO gamepad and the PS3 controller are the same player.
I tried to install joystick-selection (https://github.com/meleu/RetroPie-joystick-selection), setting up the PS3 to be the second player and adding the line "Input_player1_joypad_index= "0"" in the /opt/retropie/configs/all/retroarch-joypads/Name Of Your Controller.cfg file, now I can play a versus battle, but the PS3 controller control the player 1 and player 2 at same time!

Is there a way to solve this?