Yes those keys really are a bit of confusion!! One thing that makes it so is the text that was supposedly sent to Hunter's phone at 3:36 saying "I can't find my house key" (not positive on the wording and am not able to reference the UDG interview with Jonni) and then the one at 3:58 saying leave the door unlocked.
We were told she lost the keys, then that she found the keys, then that she lost them again and they were later found in the apartment. But the warrant describes a picture of her hand showing a ring and two keys and says that because of the texts sent and another picture of CM sent just before that from the same number, they believe the hand to be CM's and that she had those items in her possession that night. To me, since it was the search warrant, they are laying out some specific items they might expect to find. If they had found them already (ie back at the apartment) you would expect LE to say those same keys were found at the apartment and reported by friends to be CM's or something.
It's those texts that get me. Why were texts reported earlier with such specific times if they hadn't been seen on Hunter's phone?? Why would she send a text at 3:58 about leaving the door unlocked if she actually had her house key? Or if she were going to get a ride to her dad's to get the key? Unless she sent that, then EA said, hey I'll take you to your dad's and there is another unreleased text that says oh I'm going to my dad's to get the spare.
I don't know. The keys and everything around them is so strange IMO.