Without going into the definition of paradox, let me just tell you where your logic is flawed. After the Traveler (Alpha Lupi) left the Fallen, they well, fell. They needed Ether to keep them going, but since Lupi was gone, they ran out. So they created Servitors to make ether and keep them alive. So the Servitors are crappy, smaller, shitty versions of the Traveler, that were made after the Traveler. So while you could call the Servitors mini travelers, you couldn't call Alpha Lupi a big servitor