OK, you registered today. And you know that your neighbor stole refrigerant from your system-- and how much. Your neighbor must have quite a bit of equipment and some experience to be able to take refrigerant from one system and presumably put it into another. And you happen to know what refrigerant is used by both your system and his.
Good buddy, I do not know if your post expresses the truth. But I do know that I do not believe that any of this happened.

Maybe he 'cloned' the 2 lbs. to his unit.