So, I tried to add an AI Package for my custom merchant to sleep in the room. I already have a DefaultServiceEditorLoc24x7 and I added a DefaultSleepEditorLoc0x7 (for the sleep). I went in game and it does work, at around midnight she goes to bed to sleep, BUT, for some reason a bunch of random NPCs start to appear in my room! The more I advanced the time the more of them appeared. This is quite bizarre, any help is appreciated.

Bump.

I ran into this problem. If you assign a Default package and change something, it changes it for EVERY NPC with that package. What you'll have to do is create a new package, give it the Sleep template and edit accordingly.