I've been doing some experimenting and found out that the NPC storage room is actualy a teleportation room.In here you will find all NPC and items that you lost/sacrificed(the holy items and the Silver Breastplate)/have no need for them in the "normal" world.It's made so because the game crashed to blue screen of death(windows xp).Once you start a new character, the data is configured from a template in .../Divine Divinity/Run/main/startup or in some case startup.v2.
Got the info with the help of a friend and a computer engineer(friends father).
