Trifling Wind- Double Chance question

According to some preliminary testing by people on Basil, Double Chance makes it so that Trifling Whim will always fire two arrows on a single target (whereas normally, you'd only fire 1 on a single target.) I'm not sure what it's like on 2 targets, though I assume each target gets hit by two arrows. If you hit three targets, it looks like you hit two targets with 2 arrows, and the third with 1. And so on.