Not necessarily requesting an immediate fix or anything, as these aren't big issues (and I'm not sure in any case whether you're already aware of them), just thought I'd point them out.
1. I played a single-player game when I first started up the game, a simple 1v1 versus an AI on a single-star map. I won. Yay! Then I looked at my achievements, and discovered I had Star Explorer -- without every playing on a map with more than one star. Eh wot?
2. The AI has no notion of teams. While I was playing a 2v2, humans vs AIs, the AI team would frequently place bounties on each other's heads to avoid being attacked by pirates. This seems...strange.
3. There was something else, but I forgot it. So nevermind that.