During the fight with Tory at the prom after party, it is seen that Samantha has royal blue painted toenails. However, during the tournament, her toenails are painted pink. Considering the prom and tournament are only a couple of days apart, she would have had more important things on her mind than changing the color of her toenails.
Before heading to the sidelines to speak with her sensei, Sam does not call for a time-out.
Terry Silver is shown through the season as a wine connoisseur, but, when he pours champagne at the end of the episode, he is holding the bottle by the neck. A connoisseur of his caliber would know you never pour champagne that way because the heat from your hand will raise the temperature of the wine and alter the flavor profile.