Huh, having people going back and fourth like that would probably be a problem for most.
At least Golem can simply live through it all and catch up. I doubt Alec could live that long. Assuming this is just Alec back in time and not in some parallel universes past.
I'd say break the space time continuum, we don't need kids in vests going back in time in their Delorean and messing up history.
Just as a point, although I doubt many people have noticed this yet, the logo at the top of the comic will serve as a "shorthand" for which period we're in.