All questions I've had, but haven't been able to answer.
MOO
Here, if I remember correctly, is what I think I know that figures into this.
July (forget the date) - Charles killed in AZ, so Tylee, JJ, and Lori are there at this point.
August 7 - school starts for the year in this school district. (Yes, earlier than most places.)
August - sometime Kay (Charles' sister/JJ's bio grandmother) talks to JJ (via Facetime or something like that, I think).
September 23, JJ attends school the last time. Obviously he'd been attending for some period prior.
November (near the end), someone (I've theorized Kay for obvious reasons, but we don't know for sure) asks Rexburg Police to do a welfare check.
My guess from this is that Lori and JJ moved from AZ sometime between when Charles was killed and I'm guessing the point in August where Kay last talked to JJ. My rationale is that when that happened she found out JJ was in ID instead of AZ if she didn't know prior. This is based on her, if it was her, knowing to call the Rexburg PD for the welfare check.
I could be way off on this, but we can say for sure they didn't leave AZ until July and we have to assume that JJ didn't start school on 9/20 (the Friday before) and come the last day on 9/23. Everything kind of points toward sometime in August for them to get there.
I think it is very possible that Chad never met the kids. Not saying I believe it, but I don't think we can rule it out. MOO.
Also, I've wondered about Chad's house. I'm not sure if we know for sure, but I was under the impression that he owned it, not rented, but don't know if anyone has determined that. He hasn't sold any real estate based on someone's search in Idaho in the last several months. I guess it comes down to we don't know that either.