The house was supposedly deserted in 2010, yet there are wine bottles from 2012 in the kitchen.
It's established early on that the electricity to the house had been shut off when Dawn and Edith left. Edie dies soon after and the house stayed abandoned. However, when Edith opens the refrigerator door and starts walking through the passage into Walter's room, lights immediately turn on and continue to do so throughout the rest of the game, including in Sam's room, on the terrace leading into the small home-school classroom and in the classroom itself.
The viewfinder that tells Odin's story says that Odin left Norway with his daughter Edie and Edie's husband (Sven) and daughter (Molly) on January 7, 1937, but Molly's gravestone gives her birth date as December 11, 1937.
At the start of Walter's story, he says that he's been underground for thirty years. The calendar seen on the wall to his left has the year 1968 displayed. When Walter finally decides to leave, the calendar now reads 2005. Walter has actually been in hiding for 37 years.
Edith finds a letter addressed to Dawn Finch from Dr. Emily Nuth about Lewis' death. At one point, during Lews' story, Dr. Nuth says, "even as his mother pleaded with him." Since Dawn is Lewis' mom and Dr. Nuth is aware of this, what she should have said is, "even when you pleaded with him."