Ranked Rank Bug?

So yesterday after I won 2/3 my games in my silver 5 series, it said I got promoted to Silver 3... I just won another ranked game and it says I'm at Silver 4 now.....

Sorry for no proof, but here is my op.gg and you can see I've won the last couple of ranked games http://na.op.gg/summoner/userName=zeltashock