I find it rather annoying that I actually have to TRY and read what the hell people are trying to say. I also suggest you read Rule #5 of the site rules. :]
Whichever one they had downloaded first (assuming its the same hex..) will show up for them.What if you create an item for a certain hex (lets say something random like, uh 1111) and it's an object that you hold in your hand like an axe. Your friend gets a different item for that hex, which is an object you place in your house, like, a cheeseburger (random again). Well, if you came to their town holding your item, would they see you holding your axe, or their cheeseburger?
sorry for my randomness XD