During the credit limit amount test, the amount already used cannot be identified.

I was testing the credit limit for a customer on a sales order and set a limit of $500 USD for them. After that, I placed an order for $500 USD and created an invoice for it, but did not collect payment or postpone it for later. After completing this, I ran the "Refresh Receivables Transactions for Customer Account Summaries" process. Then, I tried to place another order for $200 USD, but this order was approved despite the fact that it should have been temporarily suspended due to the credit limit. Can you please explain what is happening here?According to