On the invader in your base...
A long long long time ago, back in the days of 2238 my group and I noticed we were all able to see a base that was not our usual. We looted the hell out of it...
We later found the owners, and were generous and gave the stuff back. Got in contact with admins and learned that we somehow managed to accidentally get the same faction name when we applied for one, which apparently would reveal their base to us.
I do not know if this is relevant, when I say a long time ago, I mean back in 2238 days, so this was years ago. I don't know how much of the faction code is the same, or if that glitch was ever solved.