WTF win the one game i had to play today for a replacement and it places me even further back

so I play my promos win 6-10 get placed bronze 1 from gold 5 yesterday I climb to promo and win the first 2 games than go to bed expecting to come on today and play 1 more and be in silver but no riot decides to put us in another placement game. I figure if I win that I would be put in at least silver. but instead I win it and get put even further back wtf is this shit. riot please fix this!!!