Other mistake: When LB comes into Tweeg's room and he sees him covered in spots and he is discoloured he freaks out. Why does he freak out? He just saw Tweeg in the previous episode all covered in spots so he should know that it's him.
Other mistake: When Teddy says "When is this celebration of yours going to start?" His face freezes with his mouth open, and his hand freezes in the up position.
In the Fortress of the Wizard - S1-E4
Other mistake: At the beginning of the episode when they knock on the wizard's door, Teddy is missing his bottom jaw.
Answer: Yes but MAVO had five real crystals and one fake one, and they all looked the same. There was no way of knowing which ones were real and which one was fake.