My friend and I have been carrying on a great MP game for about a month now in which we were both Advent locked allies. About a week ago we noticed some wierd occurences, such as getting notices of allied caps dying when they had actually leveled up. Today it got even wierder. His map showed that my whole empire had been taken over by an empire that from my view had been decimated by me (all they had left was one 'roid). He then said where I wanted him to send his fairly large fleet, and I laughed because I only saw literally about 5 ships that he owned. I told him to come help me out with a small-medium enemy fleet, and from what he said it was a huge fleet (despite me not seeing any of his ships there). What was going on? It's like we had 2 totally different copies of the match.

We both took some screens of it to compare.

My system overview (I'm blue, he's red)

His system overview

My endgame report (planets owned)

His endgame report

What do you think happened? Faulty internet? Game data isolation (is that possible?)?