A character preparing for bed puts her laptop on charge but is disturbed by a pitchfork scratching the window. The window is clear and bare, but when the character steps back it is entirely covered with net curtains.
A character trying to make a phone call says she cannot get a signal from just inside the front door, so tries to go outside but cannot open the door. Just minutes earlier she had been online in her bedroom, inside the house.
When the front door will hit open, a character tries to force it from the inside with his shoulder. When they were moving boxes in earlier, however, we saw that the door opened inwards - there is a screen door on the outside. No matter how hard he barged it, he would be closing the door rather than opening it.