I have Hyundai Matrix/Lavita and here is the background...

several months ago my car refused to start in the morning. The alternator just did not start turning.
They checked everything in Repair's shop (fuse box, fuel line & pump) and it turned out to be a crankshaft position sensor/ They replaced it and viola. But, since that time I got another minor issue - When I start car engine remotely (from car alarm remote control) it unlocks central door lock. I checked thoroughly and excluded alarm system malfunction as possible reason. I disconnected the alarm system and the issue is the same. It unlocks the door lock as soon as I switch the ignition on. (The same happens when I start it remotely of course).

And when the ignition is ON, it's not possible to lock doors. For that reason doors don't lock automatically when the car runs over 20 KM/h as it did before. And when I switch ignition, start the car, 2-3 seconds later central door lock tries to unlock doors once again inspite it is already unlocked. Wierd...Maybe it is somehow connected with the previous issue with sensor or faulty actuator..don't know/ Any thoughts/help is MUCH MUCH appreciated. I need to start my car to warm it up in winter without giving everybody access inside ;)