At the airport, the front license plate on Bosley's station wagon reads "California 129 UBO." Later, at Kelly's house, the rear license plate reads "California 130 UBO." Still later, once again back at Kelly's house, the front license now matches the rear - "California 130 UBO."
After discovering the body of Norton in the phone booth, Kelly, despite there being an adjacent phone booth, proceeds to call the police from the booth where the man was killed. Being a former police officer, and now a seasoned detective, she would have known better than to disturb / contaminate the crime scene.
After Bosley and two other Angels check out Norton's house, Bosley fails to stop at a Stop sign, and he doesn't use his turn indicator either.
At one point, Sabrina calls the hotel to speak to Kelly. In a brief clip, the hotel is clearly marked "ah." Later, when Sabrina goes to call the hotel again, she calls it the "Pacifica Hotel."