I'm trying out cuphead and wanted to use a generic snes controller do play it (as i've seen other people on the internet do) but when i go to map the controls, directional buttons left and right have the same name and are considered the same button. I've tried x360ce and when i configure it the two are considered two distinct buttons. It's only cuphead that thinks the both are the same. The same happens for up and down buttons, but not for the others

Anyone had this problem?