I was 6 - 2 and just won the 7th game yesterday, friday 29th August but was shown a 6-3 after my 7th win.
Something to note, i got into matchmakint when 6-2 initially and it pitted me against a warlock but the game crashed during card selection phase. I reopened the client and it was still 6-2 but no match was available to reconnect to. So i queued up again snd won the match but then it treated it as if id lost. Is this because my account was actually in two games at once? Please fix this bug and allow players to reconnect to their underground game.