Users in 2 Groups in Workgroup Manager

I have 2 user groups set up in Workgroup Manager, Mac Staff which points to an AD group and Mac Admins which points to individual AD users.

For the sake of simplicity:

Mac Staff points to AD Group: Staff

Mac Admin points to Admin1, Admin2 and Admin3 accounts

Now, Admin 1 is also in the AD group: Staff.

Therefore they are now in Mac Staff and Mac Admin.

When logging it, it applies the preferences from Mac Staff, how do I get it to apply from Mac Admin without removing from Mac Staff?