Queue is broken.
I got mid 6 times in a row so far. As you know, mid is the most desired role and jungle is the least desired role after support, so I took mid as my secondary, just to make sure that I'll get jungle, because theres very low chance that I would get the second role I chose.
The proof that I had mid as my secondary:
2 times in a row I got mid, but both times someone dodged, 3nd time still mid, played that game. After that game, I still got mid 3 more times, agen.....