Payment Dashboard now incorrect for older settlement periods

It appears that Amazon have changed the way they account for withheld funds. Withheld funds used to show as an account level reserve number on the Payment Dashboard (summary statement) so it was easy to look the Payment Dashboard and see how much Amazon still owed you at the end of a settlement period. Now the withheld funds are handled via deferred transactions but the balance of these don't appear on the Payment Dashboard for historical settlement periods, so now the Payment Dashboad statement summaries are incorrect as the are missing key balance information.

It's a bit like getting a bank statement that's hiding some transactions and not accounting for the fact.

The transaction report doesn't help either for historical settlement periods.

Deferred transactions were introduced to make reonciliation of withheld money easier but it seems to have made it impossible to reconcile to a point in the past using the Payment Dashboard summary statements.