I was playing matchmaking and I won the first game, lost the second.
I noticed someone else was in the queue also, he lost the round against the person I recently lost to and I ended losing the whole game.

I hope this was a glitch because I just lost because of someone else.

http://imgur.com/mhwzxtE

I think it's a bug since I haven't seen any matchmaking update. It's a bug that may happen few times. Every game has it's bugs

If the problem remains, feel free to post again so we can notify the developers.

Happened to me to. It's just a bug in 5.0 that hasn't been fixed yet. 5.0 is only steam support right now, and its like a month old. Maybe 2; anyways, its not a huge deal, they'll probably fix it soon (the devs)