The flashback scenes were filmed one year before principal photography began. This was done so that they would have the footage of Albert (Zachary Redden) before he got too old to play the part.
If you look closely at the article that Mark holds, you can see the street name for Dr. Jamison's office is Romero Street (alluding to George A. Romero) and the author's last name is Savini (alluding to Tom Savini).