I'm not dissociative either and often had/have complicated dreams like that. I think it's more like wondering why we don't turn around and face the monster that's chasing us and all the other things we wonder when we wake up. My husband once woke himself in frustration because he was dreaming he couldn't find his car in a huge parking lot/garage downtown and after he woke up realized he couldn't find it because he parked it in a previous, different dream!

I think that's the whole point of dreaming, to get you to wonder such things and rewrite things and see how they apply in your waking life, etc.

Dreaming isn't one-to-one in making sense but nothing you dreamed was unknown to you. I use to wonder as a teenager why all my sex dreams woke me at the critical point and then realized later it was because I'd never had sex yet. You can't "experience" what you haven't experienced and you can't think of something you haven't thought of. That you didn't see how it came out until it was shown you, were it my dream, I'd look hard at situations in my real life where I do that, wait to be shown something instead of working to figure it out. It sounds a little like the teachers who use to accuse us of having to "spoon feed" us? I'd look to see where I wasn't doing my own work in my life but waiting for someone else to do it for me.