@jasonmadeapie How do you change the controls ? When you open the controls menu (for P1), you have on the left the button on your RetroPad (your controller) and on the right the emulated buttons. Use Left/Right to change the values on the right, cycling between the possible buttons that the system accepts. Go back in game and test the buttons, then once you're set, just save a Core or Content Remap from the Controls menu.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first