We suggest you to please merge the customer, this will help you by merging the ledger and showing the total exact outstanding balance.
Step 1: Go to “Customers” and select the " Secondary Customer" which you want to merge.
Next, click on “More Option” and click on “Merge”.
Step 2: Select “Primary Customer”.
Step 3: Enter “Merge” and click on “Merge”.
Please Note: The primary customer will be shown under the customer dashboard.