Contact group showing in Address Book but not in People/Contacts

I created a new contact group and it was showing up in both the Address Book and the People tab. For some reason, the group is no longer showing up in the People tab under My Contacts. I have researched and everything I have found talks about how to get your group to show in the Address Book. But my problem is just the opposite, it shows in the Address Book but not under People. Does anyone know why? TIA