See mine have always been the first day later, and I'm scared if I move a day ahead Papi will be lost! After trialling 10 times I'll demolish something, and if his plot doesn't show up there either I'll save and go to the next day I think 

I haven't ever run into a problem like this, I have three houses lined up almost perfectly in my town. I didn't actually read far enough in to know if you fixed it haha, but if you haven't, just keep trying!Hopefully this is helpful in some way <3
Nuh-uh, villagers from other towns always take one day to show up. It's campers that need two days.You do understand it always, always takes two days for an invited villager to show up, right? There is no way an invited villager would show up in just one day. ^^;