Nfba controll problem

if I load sf3 and play 2 players on my pc I am having a controll conflict. If I press down on the player 2 stick it also registers as player 1 pressing fierce punch. In the controll setup I have p2 down as F and p1 fierce is space bar. I opened a word doc to see if my stick was sending both commands and its not and the problem does not happen in mame. The controller is an xarcade tankstick via USB. Is this a common issue and is there a way to fix it.

There is a frop box for player 1 and for player 2.

You might have the double mapping in the player 2 settings. Both have a mapping for player 2 inputs. Erase them in the player 2 drop box. ( confusing huh ? )