so I get to building an interior and link it just fine to the overworld, I line up all the walls and floors and place all the objects I want and it looks great. I go into the game and play it, it looks nice. i save the game and then make more changes, and then come back, no problem, I make more changes and now I'm missing a table. I go into the editor and delete the table, replace it and enter the game, it looks fine, but now I'm missing a custom chest. I go out move it around in the editor and resave, it's back, the table's still there, but now a section of floor up on the second level is missing! and a few other chests have gone AWOL! what in the heck is going on? is this some setting problem? need a patch? or am I missing something entirely?