So it seems that the double cube is good to get you a win in a race, but bad if you are a better player overall? Since if you get ahead in a match, your opponent doesnt have to win as amny games to beat you!
Czuch Czuckers: Nonsense. Use of the doubling cube is a skill in itself. It has the opposite affect you describe.
And another thing... you were 4-2 up in that match at the time, so complaining about lack of luck seems a little silly. Go and look at how you got the 4 points in the first place.