wtf Riot Im a Mid main and the last six matches i've been signed up for i've played my secondary Top

Seriously I want to play Mid Champions. I want to test the new Anivia changes. I'm a Mid main and yet the last six matches I've been signed up for i've gotten top. Before the last patch I was getting to play Mid more than half of my matches.

So why the change? Are there really so many people playing Mid lane now that I can't play Mid if I sign up for it?

If that's the case then you need to be more apparent to the players before they sign. Perhaps you could have a line of text saying Mid lane players only receive Mid position 13% of the games they sign up.