For example, see this payment: https://sellercentral.amazon.com/hz/me/pmd/payment-details?orderReferenceId=P01-7912778-6884317
There was an initial (declined) auth, then a successful auth 6 hours later. The initial auth has the correct Seller Reference ID (our ct_id), but the later one has an Amazon-generated reference, as happens when we don't set any reference ID. The session has timed out on our side, so we don't remember the ct_id any more.
It would probably work to post back all of the hidden fields with the API call.