When Flagg (Alexander Skarsgård) follows Bobby Terry (Clifton Collins Jr.) into the elevator, Lloyd (Nat Wolff) and three others are left behind in the penthouse, but when the elevator arrives at the ground floor, Lloyd is already there. There is no way for him to have arrived before Flagg.
At 16 minutes in, Nadine (Amber Heard) enters the doorway with a picnic basket in her left hand, then it is shown in her right hand and then back to her left hand. At 20 minutes in, Frannie [Odessa Young) leaves the same doorway and the obvious prop door doesn't shut well.