quantum mechanics
Is a real scientific theory. Not just some fiction.
I am just confused by some weird character decisions and unexpected consequences to those. But I understand what you mean, sometimes you need to... stretch your logic for the story to be interesting.
Sometimes we just gotta trust the author and creator of the universe that he does know better than the reader, and accept it. It's nice to have some "nerdy" disccisuion sometimes, but lets be lenien, ok? Stories that involve any kind of "loop"- or "timetravel" mechanic are a slippery slope right from the beginning. I think Grizz handled that very well.
Same goes for explanation: I also like explanation, but dislike endless information-dumps. Also the more information you drop; a) rising follow up questions b) destroying the mystery and room for speculations and....*shrug* fanfictions.