shut down all instances of weblogic, start the admin server using startPIA.sh, open up the console u should see the admin server running and the other 2 managed servers listed but not running,
next start the managed server using
startmanaged server admin url managerservername1
startmanaged server admin url managerservername2
let me know if u still have problems.. dont define too many systems, keep a clean config.xml, open ur config.xml and check the settings if req.