When the Family start off on their trip, Dez is not wearing a seat belt. There is a quick shot of Andy and then back to Dez, when it comes back to Dez, she is wearing a seat belt.
When Bob pays for the gas he is told it is $17. Bob hands the attendant a $20 bill and gets only two $1 bills back and not three.
In the car chase 20 years earlier, Stan is driving a 1980 Mercury Zephyr and then the story moves forwards 20 years. In the scene where Bob is at work, Harry tells him to use the computer instead of reading books. As he says; "it's the 90s". So that isn't a 20 year gap at all.
Stan Mills is mentioned as being in the Airforce. However, he is shown wearing a Marine Corps uniform in the opening chase scene.