
Originally Posted by
furiouswai
If you are sure you were signed in to the new account and you activated the new copy on it that is strange. Usually you do not need to reinstall, so long as you sign in to a new steam account that actually owns a new copy of the game (not just family shared).
It is possible steam views Combined Operations and Arma 2 + Arma 2 OA as separate games. In that case you may need to uninstall your old copies of Arma 2 + Arma 2 OA and install the new combined ops.
BE does not global ban by IP, only GUID (steam account+registry key).