Other mistake: When Valera hands Ryan the results from her comparison of the nanny and the baby the results list XY (male) for the sex chromosomes instead of XX (female). (00:32:30)
Other mistake: When the guy towing the boat at the beginning gets cut off by the black car, we see and hear him slam on the brakes, but the image we see shows no smoke from the tires, and the shot changes to when he's actually braking and the smoke appears. Additionally, when the other car T-bones him, we can hear both that car's tires screeching from braking as well as the engine revving from acceleration.