@hank-scorpio

How do you have the controls attached to your Pi, are they connected directly to the gpio or is there a usb interface of some description?

Also, you should check out the read this first link at the top of the forum pages (https://retropie.org.uk/forum/topic/3/read-this-first) and complete the information requested in there in your post.

@w44dde your issue is pretty common, check your wires on the joystick. I bet you have the wires connected "upside down" on one of the joysticks. Simple fix should be just to switch the wires connected to the joystick for player 2.