well, it never happened to me, and are you guys talking about v3? but my person became an infant the 2nd day i had it, then my third it became a teen, and its still a teen... is that normal?
It's normal. If you get Adults at age 3 those are the main and good characters. The other adults age are 4. The matchmaker comes early for the Age 3's. There's nothing weird about it.
Age 3 can also be Chomametchi but I got Mimtchi at age 4... how weird. But its normal for to turn into an adult at age 3 i think. My tama turned into a teenager at age 0. weirder!