So I followed these instructions to a T, and when the villager moved in, they had the house exterior and furniture of the villager they replaced. The same problem I've always been running into. I went to the island to recruit Chief, and right after the sold sign appeared, I swapped him out for Judy. Yet Judy has Chief's house.
Hmmm that is weird. Do we know a website that shows what each villagers houses look like and what their interiors are? I'd love to see if I actually even have that villager's house.
For the meanwhile, I'll be doing some test and try to recreate this issue and attempt to solve it.