Jeff,
What Malcolm and Frances said: the subgroups operate as independent groups, except that each subgroup member must also be a member of the primary group. Messages posted only to one do not post to the other.
So the messages a subgroup member receives will depend on their subscription settings in each of the subgroup and the primary group.
Shal
--
Help:
/static/helpMore Help:
/g/GroupManagersForum/wikiEven More Help: Search button at the top of Messages list