Wrong rank given

Tokiyo Hot - Summoner Stats - League of Legends
Tokiyo Hot / Iron 2 84LP / 6W 1L Win Ratio 86% / Lv. 113
finished 8 ranked games for placements for 6-2, every game met plat4/gold 1 players, and previous rank was plat 5. now they placed me into iron 2 and still quened with plat 3-4 players, wtf is this rank system?
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