Found another bug...

Don't know if you already know about this, but here we go;

To bring forth this bug you need to enter a single player challange which have two or more matches.

Play through the first match and hit escape as that "Prepare for the next round"-message pops up. Choose "main"...

(I do not know about the importance of doing this BEFORE the progress-bar appears. During my confirmation of this bug, I have always quit to main before the progress-bar appeared.)

Now, choose to start that very same challange again and you will find yourself beginning on the second match with zero points. There's your bug !

According to my reasoning this should NOT be some kind of a wierd option for the player to continue the previous game since the player's score has been set to zero for the second match.

I have, however, not been able to confirm this bug between the second and third match of the challenges sporting more than two matches.