Paranormal Activity (2007) - 3 questions

Question: When the couple had flour on the floor between their room and the hallway at night, I seemed to be the only one that noticed that the footprints of the 'demon', who apparently walked on the flour, only had three toes. I couldn't find the scene when watching it again, so I'm asking you if you've seen the same.

Answer: I noticed the three toed footprint as well. It was kind of like a chicken's foot.

Question: Can someone tell me if I'm interpreting this correctly? When Katie changes her mind about fleeing the house and is found clutching a cross with blood on her hand and leg, Micah takes it and burns it, after which she becomes possessed. Was she successfully warding off the demon with the cross and clutching it so desperately that it made her hand bleed, and then Micah wrongly thought it was being used to attack her and inadvertently made her possession a done deal by burning it?

Answer: The screenwriter confirms in the commentary that burning the cross and picture was a mistake because it was the last defence they had.

Question: I hope someone can help me with this: In one of the movie's /teaser/promotional posters, we see Katie and Micah tightly huddled together on the extreme far right of their bed while they look at a shadow of something that is outlined on their bedroom door. I've seen the movie more than once but don't remember that scene. When (or if) does this occur in the movie?

Answer: It's just a movie poster, not showing any part of a scene. Some movie posters may take different parts of the movie and combine them to make a more suspenseful image for the movie poster/teaser. There is a part in the movie with a shadow on the door, and there is a time where they are together on the bed in a similar position. Combine the two to make the poster interesting.