Multiple Hierarchies - Nodes not assigned

Hi,

If i take a static view of a hierarchy at a point and time and create a copy of it to make PARENTH2. What happens if extra members are added to the hierarchy for PARENTH1.

For example, PARENTH1 has the following

Member           PARENTH1

ACCOUNT 1    

ACCOUNT 2     ACCOUNT 1

ACCOUNT 3     ACCOUNT 1

Then I had a snapshot of PARENTH1 into PARENTH2

Member           PARENTH1     PARENTH2

ACCOUNT 1    

ACCOUNT 2     ACCOUNT 1     ACCOUNT 1

ACCOUNT 3     ACCOUNT 1     ACCOUNT 1

At a later date a new account appears in PARENTH1 but I dont want it showing in PARENTH2 or it could be under a NOTASSIGNED node. I am assuming though the following will happen? Where the new ACCOUNT 4 will end up being at the root?? Is there a way around this?

Member           PARENTH1     PARENTH2

ACCOUNT 1    

ACCOUNT 2     ACCOUNT 1     ACCOUNT 1

ACCOUNT 3     ACCOUNT 1     ACCOUNT 1

ACCOUNT 4     ACCOUNT 1

Cheers,