Those new NES controllers I think retrobit and tommo make them. They're cheaper made/quality copy cats of the originals but they're not very durable if you're rough with stuff (get mad, throw at floor, could break while original wouldn't.) The NES controller probably just needs the rubber pad contacts and the spot on the board itself under cleaned nicely. The others are probably shot as a joystick doing that is probably broke and with he other just wanting to go down sounds like a short unless something got between the pad and contact causing a connection.