Mark's missing day - a theory about Season 3

I have a little theory, and I'd love the Reddit Hive Mind to pick at it!

I think it's quite well known now that Mark is missing a day (S1E01). Since the Gemma episode, I suspect that other Innies have multiple innies, but they aren't aware of them.

I think it's possible that Mark went through a door on the 4th, his Innie's Innie got activated, but he would have had no clue that it happened. He came back on the 5th where he transitioned to his Outie, and the Outie and Innie would have had no way of knowing any different than usual.

I think that the reason that Mark's reintegration has been slowed down is that the big reveal for the end of S2 is that when the memories start coming together, it turns out that they're more complex than oMark expected and there are more layers to him.

We don't currently know enough about what Lumon are actually doing, so there is plenty of space to introduce the idea that Mark was taken off to do something new. Maybe even interacting with a version of Gemma on the testing floor.

Also, we get a whole new layer to the story, and that dictates the plot to S3, it's all about investigating this new story that is sitting under the story we currently know.

It expands the plot, which realistically I think we need, because without the introduction of some new elements, we're starting to get into really stretching out the 'rescue Gemma' story, and I don't see how that can last for 3-4 more seasons.

Pick it apart, Reddit fans! I'd love to hear builds or criticisms.