My games recently

I'm looking through my recent games, majority being losses of course but not really here to complain about that, and I'm seeing that the points are never close to each other. Of my last 10 Dominion games even though it says my skill is on par with everyone else's, the game normally ends with a team sub 300 points with the other team at 1200. Is this just a string of bad luck or did something change?