Character mistake: Troy calls for the "Twistornado" but his card reads "Windrive"; the cards have always read exactly what the rangers called for.
Character mistake: Bruce and Alfred play a short game of chess, after which Alfred remarks, "I don't know why we bother playing this game - you never lose." The problem is, Alfred moved into a position wherein Bruce could take his king; this is called "moving into check" and is not allowed in chess.