I've been having some difficulty lately with NPCs swapping houses, typically into my crafting area. Their current houses seem to be fine, but I believe something in my decorations is causing them to switch places. I decorated my Guide's house with chain lanterns, books, and a candle on the table, and he just teleported to my craft area. After removing the chair, he still stays there. Annoyingly he refuses to move back, even after I removed all decoration (sans chair and table) and put up a torch. I'm certain my walls are airtight, my dimensions are fine, and so on. I'm fairly experienced with this. I'm slowly arriving at the conclusion that either chain lanterns or books invalidate an NPC house. Does anyone have similar experiences? Moving NPCs is possibly the most frustrating thing in this game and it's really ruining the experience of building a base for me.