The weird thing with mining and fame end is that the game still simulates everything after the game is over. So let's say it's a close race, but you barely hit 200Np first. But an hour away, someone sent a sub to your mine. If you scroll to where you lose the mine, then technically you should've lost a big chunk of Np and Np per day, so it would show up as someone else winning. However, once the game is over everything stops.
So rooz is right, you are the one true winner (that is, if you actually win
)