When you win the MMR doesn't count.
I won 2 times already and it did not count on my current MMR. I forgot to record my wins. However, your database should have saved the matches
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Fluffinter#56670
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Fluffinter#56670 commented
I did not play and when I logged in my MMR was deducted from 1861 down to 1837 what is happening? Can you please check?