Has anyone else seen "Paranormal Activity 2"?

If you haven't seen this film but intend to, IGNORE THIS POST!

I didn't think this was as good as the first one but I have to say I lost the plot somewhat after the mother emerged from the walk-in closet. I simply didn't understand where exactly the father disappeared to (leaving his daughter to take care of things and what was wrong with the mother(if she was possessed by the demon, why didn't she simply take the baby as her sister did at the end of the film?). Additionally, was the curse transferred to the sister and who precisely by?.

Is no one on this forum a cinema goer?!

Not me anyway