Incorrectly regarded as goof: While it is learned in Devil's Bargain (2018) that Gabriel is still alive, it is not yet known to Sam and Dean. It's true that it is also not yet known how Gabriel is still alive, it is possible that he was only stabbed with a normal angel blade but that is something Lucifer should have noticed. Gabriel did reveal in Hammer of the Gods (2010) that each Archangel has their own "Archangel blade", he told Sam and Dean that he gave Kali a normal angel blade, then he pulls out his Archangel blade and said "I didn't want her getting her hands on this, this thing can kill me". So it seems that each Archangel has their own blade capable of killing other Archangels, though it's still unknown why the blade Asmodeus has looks different than the blade Gabriel had.
Even though Dean is at least 4 inches shorter than Sam, throughout the episode they are portrayed as being the exact height.
Sam, Dean and the Scooby gang drive to the haunted house. However, in A Night of Fright Is No Delight (1970), the house was on an island and the gang had to get there by boat.