[NxtGenCowboy]

Yes, many more.

The function you need to modify is CGameClientInput::MapJoysticks(). Simply sort joysticks by time of last use. You will need to add this time parameter to the joystick object. I can help show where this should go and where it should be calculated.

 
This is how to fix it. I'm able to advise if anyone wants to give it a try.  

 This is way above me..  Maybe someone else can lend a hand until this gets fixed and the shield is usable with RetroPlayer again.