sweet, what is the refrigerant pressure? it still seems that the system is not fully charged.

On the issue when the AC still works when the ignition is off - try to disconnect the battery for about 20 minutes (it takes 16 minutes for all the modules to "die off" and lose the short-term memory). It seems that IMHA (or IHKA?) needs to be reset. If this doesn't help, then carry on with other troubleshooting techniques