When Riley knocks on the hotel room door to the people making the porn tapes, the guy has his hand on the door but drops it as soon as the door is open, but in the next shot, his hand is on the door again. Also, the position of the door between the man's body changes in between shots going from a few inches to almost a foot of space.
Nick first gets to the Park Pines Motel and kneels by Haley's dead body. He then hears her voice asking "What happened?" Nick stands up and turns around, where the first transition occurs, changing the time period to a 365 days before. In the background, the Rio Hotel and Stratosphere are shown. The address for the Rio is 3700 West Flamingo Road. The address for the Stratosphere is 2000 Las Vegas Boulevard South. These two hotels are on opposite sides of the Las Vegas Strip, about 10-15 minutes apart.
In one of the flashbacks Nick has Grissom's name spelled "Grissiom" in his phone. Having been his boss for many years, Nick would know how to spell his name correctly.