Custom User Group Issues

When the users on my domain create custom contact groups, the people added into them

show up in the custom group and remain in the large group pool that is setup using LDAP

is there a way to make it so the person is removed from the large pool and placed only in the custom

group?

Thanks in advance,

Kevin

anyone have any ideas on this? Is it like this for everyone? Is this something that is only seen in my environment?