Continuity: Door on plumber's van at the new house.
Revealing mistakes: When JC arrives at the new house in Vermont the first time, she opens the van door and takes the baby out of the car seat without unbuckling her first.
Errors made by characters (possibly deliberate errors by the filmmakers): When they're showing the newspaper and magazine articles about JC's success, the last clip has her last name spelled as "Waitt".
Revealing mistakes: Two of the news blurbs have identical text, just with different headlines.
Errors made by characters (possibly deliberate errors by the filmmakers): When JC gets a flat tire on the side of the road, she jacks up the car before loosening the lug nuts.