No, this happens when you connect two DIFFERENT versions together.I have a v2 and a v3 I connected them. My v2 is 6 years old and my v3 is 0 years old just got it. Anyways, my v3 is a baby mazutamatchi. But when i checked my v2 friends list my v3 friend is an adult and is a nazotchi. Is my friends list messed up or sumthing?
The Adult character that you had on your V3 was NOT on the V2, because the the oldest version has less characters then the newest version. Don't worry, its nothing big, this happens to everyone who connects with two different versions at the same time! 
