My advice would be to adjust round 2 to benefit the looser's from Round 1, maybe introduce 'one at a time' deposit into the 2nd Round after say the 3rd investor. I cannot think of any other ways. Lesson Learnt, maybe my exit from the entire BTC game.
Good idea, for every 3 or 4 new investors of the round 2 to put one of caught in round 1, in the same order in which they were.