I started playing about a week ago, and none of my villagers that I have had from the beginning are aging at all, and my mother hasn't stopped nursing her baby yet....but I found a child in a crate, he was 3 when I found him and my child that I already had was 5. Now, a day later, the child I found is 9 and the one I have had since the beginning is still 5! Why aren't my other villagers aging?