Step by Step How To for Bank Corrections

A Customer sent a check and we recorded the payment for $200. The check was deposited to the bank and a Bank Deposit in Acumatica which included the $200 check was created. A few days later the bank came back with a correction stating the check was written for $20 not $200. We voided the $200 payment then created a $20 payment and created a corresponding Bank Deposit. Is there a step we are missing? The original deposit with the $200 payment is still equal to the original deposit we created so our bank rec is off by $180. Please help me identify what step is missing