I believe there are actually two, identical moons that rotate the earth, one exactly opposite the other. The Moon actually orbits at half the speed we think it is and is closer than we believe. That is why we get TWO TIDES per day and not just the one we would get if there were just one moon.
There is actually one real moon (that the astronauts landed on) and a fake spaceship moon, positioned at exactly the opposite side of the earth. That is why we never see two moons at once.