What browser are you using? In Opera hitting CTRL + left mouse button in the latest games list opens two background tabs, each with the game. That’s the closest thing I have ever experienced to what you said.
You seem to be the only person experience this error at this point. Strange that it happens on all web browsers though… perhaps try clearing your recent cache?
even funnier
this doesn’t happen if I delete the description part with inspect element (actually deleting only game title with link is enough)
so browser thinks I click link with left mouse and image with middle mouse ? I’m confused