Despite being killed in an earlier fight, the Wu-Shu stylist can clearly be seen practicing in the training area.
Despite being killed in one of the first fights, the Barbarian Swordsman can be seen in the training room right after (and also later).
In the final fight Drew's costume changes several times between shots.
During the final battle the two fighters are both wearing nearly identical black uniforms, but the fight includes footage from an earlier battle where another fighter was wearing red ribbons, they fly in and out from just outside the camera.
Before the fight between Kenjiro and Phan Xu, Phan is swinging around a chain weapon and his swords are leaned against the wall. when the fight starts he already has his swords without retrieving them.
Obvious use of doubles for love scene.
Just in the opening scene of the plane crash, the propeller of the aircraft isn't rotating as it hits the trees.
Obvious use of footage from earlier in the movie during the final fight scene.
During the opening sequence, both the set and a member of the crew are reflected in the windows of the airplane.
Why would he have an American accent when he was raised from baby to man in Japan?