Placement Results after Placement Game 1 out of 10

So I played some Flex queue, only one game mind you. And after the game had ended, i had gotten a message telling me that I will start the next season at Silver II. Is this some sort of glitch? Because I still have 9 more placement games to do. Should I keep playing Flex queue, or is that my final results?

http://image.prntscr.com/image/87f15de7cd8a42ffbe5aa1ef55526e8d.png