The Wright Brothers might have flown before Dumont, but they DID NOT invent the airplane, that's for sure. The device they used to fly is FAR from being an airplane, while Dumont's machine isn't. I mean, the Wright brothers had to use a catapult to launch their "whateve it was" machine into the air! How can that be considered an aiplane?!??
Santos Dumont invented the machine that took off and landed without the need of any outside help. That's an AIRPLANE! End of story. But of course, Americans will never recognise that, since they need to be the inventors of everything and the best and first at everything, even if they're wrong.