You are using the Credit Card Management feature to record payments on invoices that were paid by credit card and the Credit Card Payable account is blank on the credit card vendor setup and in AP Settings, GL Entry Settings. Therefore, the Accounts Payable account was used in its place.

Refer to What accounting transactions are created by Credit Card Management in AP?

Set up a credit card payable account in General Ledger and assign as the Credit Card Payable account in Accounts Payable. Refer to How do I set up and use Credit Card Management in Accounts Payable?

• Existing invoices that were paid (Record Payments by Credit Card) using the Accounts Payable account as the credit card liability will satisfy that liability when Verify Statement, Create Invoice is done.
• New credits card payments (Record Payments by Credit Card) going forward will use the Credit Card Payable account you assigned on the credit card vendor or in AP Settings.