Thank you CSIDreamer!
1. I do not necessarily agree with this one.
The PCA on the bottom of page 1 states:
As I approached the room, I could see a body, later identified as Kemodle's, laying on the floor.
[...]
Also in the room was a male, later identified as Ethan Chapin [...]
This sounds as though the body can be seen on approach to the room. In this context, "also" could mean "in addition to this" or "following on from this", as opposed to only meaning "also" as in "as well as".
I do not believe it is 100% that X was in the bedroom on this basis.
2. True. Perhaps he didn't mind if she did, as perhaps his intention was to leave some witnesses alive. JMO