Horrible Final Act

Rating: Null/10 (18 July 2011)

What do you get when you mix The Exorcist, Poltergeist, Dreamscape, The Entity, Saw, and Ghostbusters? You get one of the most ironically titled movies ever: Insidious.
Every single one of the movies listed above was referenced in one way or another; the most annoying being the sudden camera shaking and bounce around type edits from the Saw films. There nothing original, let alone scary, about this uneven, silly "horror" movie.
Just a few questions about the plot:
What happened to the two other children in the final act? I ask this because if the baby was staying with the mother, why was the baby monitor still in the room?
The family just moved into a house and was able to sell it and rent another one almost immediately? Come on.
How is it that Elise, the psychic, was unable to tell that the old woman came back with Josh?
Total waste of an hour and 45 minutes.