Photographs on board in fire department change their positions in between takes.
Joe tells Allison that the average person dreams 6 times a night, which is 42 times a week , 168 times a month and therefore, 2016 times a year. That would only be true if a month was exactly four weeks long. In reality, 6 dreams a night would be 6 x 365 = 2190 dreams a year, not 2016. Strange error considering that Joe is supposed to be a doctor of mathematics.