Other mistake: When Emma Watson says "get wasted all the time", her British accent is very obvious, especially when she says "all."
Other mistake: After the daughter visited with her mother for the first time, she is reviewing the footage with the priests. No such camera angles were taken for what they reviewed, only an overhead room camera would have been available.
Other mistake: In the scene when Lindsey picks up her paycheck, the check is not signed.
Other mistake: The news anchor in the opening scene noticeably flubs her lines at one point.
Other mistake: When Will is in the club and Lucia's friend is checking his wound she feels around to see if the bullet is still inside his body. She says the bullet is not there so cauterises the wound. Will does not have an exit wound so the bullet must, therefore, still be inside.
Other mistake: Cam says he ran for fifth grade class president on a platform of getting rid of a dangerous playground slide. Marty later says he voted for him, but that he was in fourth grade at the time, which would have made him ineligible to vote.