Question for people experienced with the silver league.

Currently sitting in silver 5 and during my last few solo/duo games i saw people from all over the bracket, from 5 to 1, i even saw a gold 5 in one of my games. Is that perfectly normal, or am i doing something wrong? EDIT: Small update, Silver 4 now, and yesterday i seen a plat guy in my game, i feel sorry for him.
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