Pref Mid

So today on ranked i went with Primary mid and Secondary fill because i felt like playing something a bit different and while i know i'm more likely to get support i wasn't too phased but when i get 6/6 games played with that combination i get a fill and of those 6 games, 5 of them are support, well it gets a bit annoying. Why though? surely at least 1 of those games should have been mid like cmon rito sort your system out.