I am trying to mod in a player chest into Hod and Gerdur's home in Riverwood as I am playing as if the player is staying there for a brief time as he gets his feet wet. I thought I could just drop off the excess items in one of their chests but ran afoul of a strange bug that made the items I dropped off become 'theirs' and to retake my items meant I would have to 'steal' them... which was odd.
I dropped in a chest of my own (duplicated one of the ones in the home, changed the faction to player, then put it by the hay pile by their kid's bed and the bar). Same issue, my items became 'theirs' and to retake my things I would have been a thief.
Is there a proper way to do this or is it not possible to do this in the home of an npc?

Thanks for any help you can offer!