Make sure u got open spaces,if u got more than 10 Villagers,pls adjust the system time back for one month(Avoid holidays, weekends, KK concerts),once u changed ,pls go back to ur island, whoever has clouds on his head will leave,if u do not want the guy to leave,then pls do not keep on a file,then adjust the system time back for 2 days,then the clouds will transfer to another guy.Below are the step to change the system time:Settings-Host-Time/Date-Turn off network time synchronization-Flight mode Off(Make sure u have closed ur game when u doing this step)