When Dean and Sam go to check out Crawford Hall the second time, Sam is carrying a briefcase or toolbox of some sort. When he is inside, the case is silver with black on the corners, but when he and Dean exit the building, the case now black with silver trim.
At 32:18 the logo is on the other side of Jeans jacket. If you look closely you can see it mirrored. It looks like they flipped the footage. Also the staircase is going the other way and the no smoking sign is also mirrored. At 32:25 everything is reversed again.
In the recap, when Dean turns the car on with the music loud and the wipers going, the song that is playing is different than the song that is in Hell House.
When Dean walks through the door of the auditorium, in the wide shot, a crew member can be scene in the control room dancing along to the music.