Is the reward indicator bugged?

So I usually just skip all the rewards and that makes it hard to see how many games i need to win for my next daily reward. I usually go to options-rewards then, but I just found out that the indictor is not accurate:

it's marked on 16 (next step is 18 to get my 75 Ore) so i need to win 2 more rounds. But as it happens i just kept track after my last game and it said 8/12 rounds won. That's in total not 16, it's 14. And i need to win 4 more rounds for the 75 Ore.

Is this a bug or what?