In this strange complex of time and space anything can happen

Well, yes, obviously. That's true of any work of fiction. But usually what the author says is the 'correct' interpretation of the story at least seems like one plausible reading of it to other people, even if it's not their preferred one. My complaint here is that what Moffat is telling us about this story from outside it in the real world is actually at odds with what I think is the most plausible reading of what we saw on screen (scenario 3). Then he seems to have resorted to out-of-story proclamations to solve the problem, and 'steer' us back to the (counter-intuitive) reading he wants us to take away. That's just lazy, and worse throws up all sorts of confusions which he could have avoided, and which I'm pretty certain he's never going to resolve.