NES 2nd Player's SNAC buttons are not mapped correctly

[aarkay14]

Hi! I am seeing a weird issue - when I play a 2 player run and gun game using SNAC I see that the 2nd player's controls are mapped incorrectly, for example, pressing down make the character go up.. it is strange, when I flip the controllers in the setting then the same issue happens for the 2nd player. It always happens for the second player no matter what. The first player works fine, I have used different hardware and they all show the same issue. May I ask you to kindly verify this at your end or let me know if I am doing something wrong.