The "Payment Methods" field originally holds the payment method chosen on the 1st tab of the contract under the Financial Obligations. The value could be a credit card type, or checking/savings or invoice me. Then once the parent submits the contract and pays the deposit, this field value changes to whatever was chosen as the payment method for the deposit.

There should be two fields. One indicating the choice for the payment plan and the second field showing the choice for the deposit. There seems to be only one field now, “Payment Methods”, which sometimes shows the payment plan method choice and other times the deposit payment method.