In Season 1, Episode 2, "Frienship is Magic: Part 2" when the Elements are first shown, there are clearly six orbs on the statue. When the orbs are removed, there are only five present, Pinkie says as much. Yet once Twilight vanishes, all six slots are clearly empty. So where did the sixth orb go?
(I tried to get screenshots but apparently either my browser or Netflix doesn't like screenshots, as in both incognito and normal browsing, the pics are just fully black.)