Looking at your gains, I agree you should have got the first win bonus for your first game.
Actually, I guess it's what happened, according to numbers I see on my side.
In the postmatch screen, an icon show if the bonus was consumed or not. It may be only a display issue (but still an issue ^^

), that show your bonus consumed after next postmatch and not in the nice one.
Thank for all the information you could add.