I think this episode finally locks in a bit about how everything works. First off I'm pretty sure we are not seeing two different points in time (although I was a pretty big fan of that theory and the show makes it seem like a very distinct likelihood). I might be wrong, but the scene with Ford and MiB make it pretty clear that we aren't talking a 30 years difference in what's going on. That being said, I still expect some sort of twist in how the scenes are shown to be a reveal of some sort.
Since the first episode I've been trying to think through the logistics of how retrieving the hosts work and when the park resets. I started thinking it was likely there was a copy of each host underground and the consciousness travels back and forth when they need to do an interview. At first it seemed like the park reset every day, but then we started seeing stories that lasted more than a day; and of course the MiB is inside for an extended period of time. Back to the hosts, it now seems very reasonable for there to be multiple copies of a host also because they get shot up badly enough they'd need to swap them while being fixed up. If their consciousness can jump between bodies, that also lends some credence to the fractal AI theory -- that they are subconsciously linked and have been subconsciously "solving" how to becoming sentient over these 30 years.
I don't know if any of you ever played a dynamically-resetting MUD, but that's how I see the park. When a particular zone hits a certain point and the guests are done there, that zone resets. Kind of like how NPCs respawn in an RPG, too. The main town has short storylines and can be pretty much reset on a daily basis. Further out allows for longer storylines -- and with less interaction less need to reset as often. Each host can restart their loop as needed as Lawrence did (also this is more evidence of multiple copies). We're not talking about hundreds of guests at a time and it isn't likely many of them have the money to spend an extended period of time in the park, so while occasionally a storyline might need manual intervention from underground I doubt it is a frequent issue.
So that's my working theory for now.