Shawn states that the house has been unoccupied and boarded up since the 1950s, yet the doorknobs and several of the furnishings (especially the bathroom toilet) are clearly from the modern age and not from 70 years ago.
When talking about the symbol found in the closet, the child that is calling Shawn on his laptop pronounces "pagan" with a soft G, as "pajan", which is incorrect.