Other mistake: Randy is using her laptop to watch Staci on the surveillance camera. It is just past midnight, but the time at the bottom right of the camera image says 12:18 PM (noon), rather than 12:18 AM. (00:42:00)
Plot hole: A real estate agent would first ask a prospective home buyer what price range he was interested in and calculate "how much house" he could actually afford to buy before taking him to look at available houses. Austyn took Jim to see multi-million dollar houses, then Jim told her he was "looking in the $250,000 range." Austyn told Jim they could close at $2.5 million and he'd only need 10% down. The 10% down ($250,000) equaled the total amount that Jim wanted to pay for a house. (00:14:03)