Moving balances out of an Account line.

Hello all, 

I'm hoping you can help me with something. 

Prior to our FY that started 10/01 Our clients were all Account lines in the chart of accounts. 

Current Liabilities:  

REX - Resident X

       REX1 - Income

            REX1A - SSA

       REX2 - Expenses

           REX2A - Rent

As such these accounts all have a balance to them. 
Starting this FY I entered all the clients as individual Customers, adding them in the customer center, and issuing a credit memo to mimic their closing balance on their account line as of 09/30. 

The problem is they all still have a balance with their old line accounts. How would I get rid of these? Is there a way to move those balances to the Customers? 

I'm very confused at the moment, and would like to fix this if possible before I get too deep into the FY. 

Thanks for any help.