Problem With AR Customer Accounts List Report

[Matt]

We are finding that for some reason invoices and payments are not always updating the Accounts Receivable Customer Accounts List report. The balances on this report should agree with the total of all open items for that customer shown on the Accounts Receivable Open (Unposted) A/R Items report. I compared the two reports and found several customers with differences. It appears that if an invoice is created and then deleted with no payments, but with an amount on it, that the Customer Master record is sometimes not being updated. No one is going into the customer account and changing the balance so I know that isn't the cause. Is anyone else experiencing this problem? Does anyone know what's causing it and what needs to be done to stop it from happening? This problem is causing erroneous receivable balances to show on the AR Customer Accounts List report.