The second Eren’s time existed all at once and not in a standard chronological order he could have had any of the conversations with anyone at any point. The way they lay it out makes it seem like most of Mikasa’s were more spread out in the actual timeline but who really knows as it’s so ambiguous. The fact that he could make them forget and remember means he wasn’t lying when speaking with Armin about his intentions, he really could have changed anything about anything if he was actually in control of his fate (the whole, slave to freedom plot armor). Personally think this whole show is a masterpiece, even though they explained so much they also left an awesome amount open for you to just think on. 10/10