there are these Drop-box looking things all around the map and in the post office there is a machine in the back room that when you lock it, no more props or whatever can be put in these "drop boxes" because, there is an invisible wall preventing anything from going in. Also, in the post office in the back room next to this machine there is what looks like a bucket and when I put things in there they dissapear and i have no idea where they went to. Any help is great, thanks.