There seem to be a few issues with the matchmaking interface that probably could be improved.
Browsing for a lobby game I can't select a match by double clicking with the mouse.
If i single click a match then sometimes i have to press Esc to unselect the match before i can select another. It seems very clunky and hard to use.
I just had an experience where i was searching for quickmatch. While searching i pressed browse to look at the public lobby. This did not stop my quick search and i found i was placed in a quickmatch match when i was in a different screen trying to choose a public lobby match.
Please post if you have had similar problems.