One moment, I could be playing Unreal Tournament 3. The next, I shut it down and it still shows up on my active connections as listening despite not running as a process. And when I right click the connection and select terminate connection, the connection is still there.
There can be a delay in refreshing the connections display in CIS. How long does the connection remain active after closing UT?
If the problem is not due to the delay, I suggest that you try a fresh install of the latest CIS. If the problem persists, then report it as a bug, with as much detail as possible regarding your OS etc.