At the risk of divulging my hidden nerdiness, this is beginning to remind me of the episode of Star Trek: The Next Generation where Worf travels through a quantum singularity (or something) and fractures his own reality...except he jumps between the parallel realities. But once the problem is solved, all of the fractured realities merge back into the actual reality, which is what it sounds like is happening to our doubles. Trouble is, which reality would emerge? That's where I'm concerned...
And one can't discount the possibility of other meddlers. After all, Lois knows they're missing something. I really like the juxtaposition of L&C as they should be with L&K, whose lives were thrown off. The differences in character development are fascinating.