This wasn’t an issue last week, but this week is counting wins as a single point of progress. A buddy and mine just won 4 games of Junkenstein’s revenge and saw that we only got 4 points for it (not the expected 8). This issue did not occur to us when we played last week oddly enough.
I can say I have the same issue too but the developers are fully aware of this issue. The only solution right now to fix this is to reset your game every time you complete a match of any of the Junkenstein modes but if you don’t want to do that then you will just have to play the PvP until this is resolved.