[Flatrater]

Your security light coming on is a problem if it goes into theft mode you are locked out of starting the car for 10 minutes. Even disconecting the battery does not clear the problem because once you reconnect the battery the timer starts again.

Their is no way to resync your remotes on your car!! I would suspect that one of your door lock actuators ripped the bumper off the arm. Does your lock unlock but not lock? If so I would bet its the actuator.

Your AC fill port is the one on the accumlator, that is your low side fitting. Since you grabbed the lines and one was hot the other cold your freon level should be ok. There has to be another reason why you are not getting cold air out of the ducts.