Two players had an estimated score yet didnt even play

I had ryu and smoothie, they bot had predicted scores, i wasn't sure if they were playing but because the people that subbed for them had 0 and they both had estimated points i kept them there, this has lost me a game, so unfair, what is going on here riot?? why are you giving players estimated points when they don't play and the ones that do play have estimated points of 0?