Credit Memo Balance on Transaction Header = $0.00

Hello,

Should credit memo balance due on the AR Transaction form be $0?

Scenario:

1) In Order Management, Created Sales Order and Auto Invoiced AR Transaction for $1000.00

2) In Receivables, Applied the cash receipt for $1000.

3) Customer Returns the item

4) In Order Management, Create RMA - credit only Sales Order for $1000 - Auto invoiced the -$1000

5) In Receivables, queried the credit memo and the Balance due on the Header was $0.00, but the lines shows -$1000.00

6) In Receivables, queried the original AR Transaction the balance due on the Header was -$1000.00

7) We did not create accounting between any transaction steps

8) Shouldn't the Credit Memo Balance due be -$1000, the Original Invoice be $1000?