This affects the build on OSX as well. It looks like it's storing the mappings based on joystick name, and then truncating the name. On OSX, the X-55 identifies these as "Madcatz Saitek Pro Flight X-55 Rhino Stick" and "Madcatz Saitek Pro Flight X-55 Rhino Throttle", both of which get truncated to "Madcatz Saitek Pro Fligh." in the game / settings.cfg