Ranked MMR is Broken

I just finished my placement matches and ended up in silver 2 with 30lp, I went 8 - 2 in my placements and was playing againts mid - high gold with the odd plat 5. My question is if im facing gold players in everygame and mainly its all gold but myself being the only silver how do I get placed in silver when I went on a 7 game win streak and ended with 8 wins 2 losses. If I was to que a match right now I will que up against high gold players because my MMR is higher than silver.
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