This is happening so much right now. Seems to be a purely vindictive thing people are doing and it's absolutely absurd that you don't get a win when your opponent quits regardless of the result.
I've had to play the fourth game of a draft two, three and even four times over because my opponents quit when (I assume) they feel like they can't win anymore but the game is still tied. I also thought you couldn't pause/quit when you've given a penalty away before it is taken, but that happened to me last night also. Also had a couple of WL games where this happened.
Have other people experienced the same thing?