in a recent game i played as andro and while we were losing at the end my hero started to take commands from some one else. My hero started to walk into enemy heroes and used my port key to tele into enemy heroes. I even had a spam click fight to keep my ando in the fountain. I think it was mad man because at the very end he used my hero to swap him safely into forest.
date of match: 12/16/2010
Most likely not a bug, most likely u just clicked the share unit button. I do that everytime without knowing it. Didnt check replay though
It's definitely possible if you know how to play well.