Ranking reset today I wanna know why

I played 10 games of Halo5 gaurdians yesterday in slayer got ranked diamond after the reset took effect. Today I played 9 games of doubles now everything has reset before I could play my tenth game I wanna know why

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> I played 10 games of Halo5 gaurdians yesterday in slayer got ranked diamond after the reset took effect. Today I played 9 games of doubles now everything has reset before I could play my tenth game I wanna know why

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