Originally Posted by svache
This is exactly how it works with me. I'm a bit surprised it didn't work like that with the OP.
When the car goes to ready, and I open the door, it will go to the off state. Same as with you, I leave everything on, I close my door, lock it and everything is shut off automatically.
The only time I actually hit the on/off button is when the car did not go to ready state but keeps idling because of the a/c.
So last night I tried a few different ways to replicate what the OP did and the only way this is possible is to have engine running, get out and lock the doors. Then the engine will remain running. Not trying to be an ass but just maybe OP rushed out of his car thinking he had shut it off and locked the doors.