I'm having the same problem but one wireless redgear x-box gamepad is working fine and I'have configured all but my another gamepad which is detected but I cannot configure any buttons(wired redgear- x-box(in retropie game it is says x-box) but in windows it says ps3)... and I'm getting errors installing ps3 driver..
Any help will be appreciated!
Why don't we let the normal flow of product reviews to take place:
if your users are happy, they'll leave you good reviews; if they don't like it, they'll post a critical review (not just 4/5 reviews).
if you want to make sure it works with RetroPie, then you should test it and advertise as such. It's only you that can provide support for the gamepad/fight stick, not the reviewers or this forum.