Continuity mistake: From the outside, Robbie watches the tree and walks backwards to his bed, made and with a green cover on. When the angle changes, the sheets are different and the bed is unmade.
Continuity mistake: The first night Robbie is watching the tree there are three Star Wars toys by the window. From the opposite angle, the amount and distance between each other is totally different.
Continuity mistake: The night after burying the bird, Robbie's hat is not tucked in, however a frame later it's totally tucked in.
Continuity mistake: While the neighbour's TV swaps from playing the football game to Mr. Rogers, the guy in green on the background lowers the phone. A frame later from a different angle his hand is up and he is repeating the previous movement.
Continuity mistake: After Dianne says "Stay away from the light" a scientist is standing behind a woman saying there might be walkie-talkies in the home. A frame later he is standing in front of her.
Answer: It seems that the majority of the activity was focusing in on the Freeling house exclusively. It's not fully explained why they were the only house affected, but there are a number of possibilities. Possibly because it's where the highest concentration of spirits were at unrest. Possibly because it could be inferred that the Freelings moved in first given Steven was involved with the company that built the community, and thus they became the first targets. And possibly because they were trying to get to Carol-Anne since she was an easy target.
Also, it is mentioned in the movie that Carol Anne was actually born in the house. That likely caused everything to focus on her.
It was not meant that Carol Anne was literally born inside the house, just while the family was living there. It was just a casual colloquial expression Steven's boss made.
raywest ★