Other mistake: During the Sekai Taikai tournament, all of the characters and extras wear new, pristine gis (karate uniforms) that never seem to get dirty. As they use their own gear, you would expect at least some wear and tear from previous use, or some marks from the fights, training, sweating, etc., to show occasionally, but the uniforms all seem brand-new all the time.
Audio problem: When Tori and Kwon are talking in the hotel lobby, Tori says, "Maybe you shouldn't have let him kick your ass," but as she turns her head, her lips aren't moving.
Continuity mistake: When in the woods at the meeting spot before the flag events, the sun is first high up in the sky, then very low in the background close to setting, then back high up in its original position (all from the same exact spot in each scene).
Answer: Both.