When in car w/all doors locked, should trunk release pop trunk n unlock doors?

What is your question?

When any of the doors are open and not locked it won't do this. But when all the doors are closed snug and locked and you hit the trunk release button on the console it unlocks the doors and pops the trunk. I've had this car 8 years and it never did that before. It would only open the trunk. I had major work done on the car and when I got it back it did this. The shop is telling me it was supposed to do that all along? I need to know what it's supposed to do and the manual doesn't specify so I can make them fix it if they took a shortcut that's now making it unlock the doors too.