When the plane crashes and Ben is giving his orders to Ethan and Goodwin to go to the crashing spot, Harper stands behind Goodwin while Ben is talking, but in the same scene from A Tale of Two Cities (2006) Harper wasn't behind Goodwin at all.
When Juliet is with Harper, she is wearing bright lipstick, but when she is summoned to see Ben in the next scene, she is no longer wearing it.
Charlotte is showing using her thumb to "uncock" her pistol's hammer. However, she was using a Glock, which does not have a hammer.