For anyone who may be confused, many floor plans online have JAR's bedroom labeled as Melinda's, and vice versa. Here's one with the actual arrangement:
If this had been our house when the children were little, I'd have put one child in Burke's room and the other in Melinda's. Both rooms open onto to the main staircase (at 11:00 in the video on p.1), which opens directly into the master bedroom above (no doors), creating a large air shaft great for carrying sound. Our bed would have been over Burke's room. If the children had needed help in the night, we'd have heard them and been downstairs in a flash.
No way would I have put my six year old one floor down, alone, at the opposite end of the house, and next to a stairway leading down to three handy entrances for an intruder (garage door, butler's pantry door, and the John Fernie Memorial Door by the kitchen). Not only would it have been harder to hear her in the night, but also, if someone had come to abduct her, by the time we heard anything it would have been too late. He'd have been out of there with her before we got down the back stairs.
Since I first saw the layout of the house it has troubled me that JBR was left isolated in a burglar-bait house with the security system turned off. What were they thinking? That part of the house isn't tricky. Anyone who'd come in through any of those entrances and gone up the spiral stairs would have been in no confusion about how to get back out.
So why was JB so far from her parents? Were they trying to keep BR and JB apart at night? Was Burke's room closer to theirs because JB tended to go there, not BR to JB's, and it would be easier to hear them? We may never know, but you have to wonder.