Back to Duel - S2-E1
Continuity mistake: On Jaden's first turn, there are five cards in his left hand. In the close-up shot, Elemental Hero Sparkman is the fifth card on the right-hand side. Jaden then picks up the third card from the middle, which is then revealed to be Sparkman, even though it was on the end of the row in the previous shot. (00:05:09)
Back to Duel - S2-E1
Continuity mistake: When Aster draws the "bad card" from his deck, the card is at an upright angle. The next shot, when Jaden tells him he might want to work on that poker face, the card never changes position. When it cuts back to Aster, the card is suddenly held at a rotated angle. (00:11:14)