Footballers can have a period where everything they hit goes in, Cisse was doing it last season. That doesn't mean that a forward should be expected to score with every chance, or does it?
You seem to think that creating two good chances in a game is good enough yet when we beat Southampton we had the best goals to chances created ratio in the league, that day and it was only 40% which is less than a goal for every 2 chances.