Certainly not an expert on quantum mechanics but I think the idea is that there are many parallel universes where things went differently and you can somehow choose to go to the one with your preferred outcome - all of them exist simultaneously but until someone resolves that universe, it both did and didn't exist. The box somehow allows the user to navigate all possible positions and choose the one that they wanted.
This is the way I was thinking of it, and I think the latest episode made that exact explanation when invader Jason was talking to original Ryan about its use.
Yes - originally you'd have at most 1 Jason per world (ignoring all the worlds that don't have Jasons), one Jason and one matching world for each branching decision he made in his life. Once he started making decisions in the box, however, that creates branches that don't have a unique world tied to them. Or at least that's how I'm understanding it.
I'm talking about post abduction, after he settled on Jason1's world. He continued to use the box, whether it was when he was training Leighton or collecting more ampoules or whatever. He put himself in superposition and presumably made "decisions" about which world he was going to every time he was in the box. You'd think that result in multiple Jason2s that had laid claim to Jason1's Daniela.
