I think some of the issue may have also arisen from me misreading, and there being no means to replay the popups after I realize. Additionally, buying should probably be accelerated somehow so not to waste too much time menuing and more playing the game. But I'm still not understanding how to exceed 6. But after much struggle I did manage to figure out how to reach 7; I think it needs to be explained more clearly - it's implied you want balance, not flickering between both extremes.