That's weird. I tried it with my own XBox One controller, and next and eject are swapped, and interact is correct.
Guess that's just some Picotron weirdness. It is still young software. If I'm not mistaken the order for non-Nintendo controllers is south, east, west, north, but apparently Picotron is south, west, east, north? Idunno. The last two buttons don't even have names, yet, so it's just gonna have to be weird garbage until Zep sorts it out.