Factual error: Tarrant fails Astronomy 101 here, just as Travis did in the first season. He tells the clerk, "I'm surprised you've heard of it (the FSA), if you're from another galaxy." The Tharn and his minions were not extragalactic; they were from other planets in our galaxy.
Factual error: Cally's bracelet falls off while she's being dragged to the platform by the troopers, but she somehow manages to teleport down to the planet with them anyway. And the lost bracelet later miraculously appears on her wrist in time to bring her back up again.