When Pablo's mother is gathering stacks of money (US dollars), some of the notes have the larger portraits of presidents which weren't printed until the late 1990s.
When the Marine Colonel is talking to Pena at the car, we get a look at his ribbons. They are in the exact reverse order of precedence. For example, the bottom three ribbons (L-R) are Navy/Marine Commendation Medal, Bronze Star, and Silver Star. These should be on the top row and flipped in order to be correct. The entire set of ribbons is backwards.