Difference between Bank Account Number and User Entered Bank Account Number

Summary:

Hi Team, currently we are using the Payee Bank Account Number field in ACH NACHA format however Payee Bank Account Number is different than Payee User Entered Bank Account Number. Would like to understand the impact of it and how bank recognizes the correct bank account number from this.

We saw last 4 digits are same for the account numbers but prior to that, digits are different.

User Entered Bank Account number is the number user entered into Oracle.

Payee Bank Account Number (Bank_account_numb_electronic) is the Oracle formatted one which is sent to Bank.