Recently downloaded the emulator onto my m8 android box along with some selected roms. I have used usb sega play pads bought from ebay and have configued the keys individually.
Now, when i choose turtles tournament fighter, it works with no problems with both controllers but, if i choose the likes of mario kart or super tennis then the second controller will not register any button presses. I have only configured the keys and everything else on the app is on defaults. i have tested the pads individually on both ports and they work.
Is this a known bug with certain games or is there something i am doing wrong?......(most likely the latter)

Any help would be appreciated, thank you.