Dude, it's like you wrote out in a really long and detailed way of my experience dealing with the amazing cooling system.
Look for leaks.
Bleeding the system to the best of your abilities should include in this order as far as I recall...
Keep car off
Put 50/50 mix in
Turn HEAT to 91 MIN SETTING ONLY
Wait for fluid to come out of bleeder
Coolant temp to 30*c
top off done
Last edited by ruskisky; 02-07-2013 at 12:47 AM.