credit limit check

Dear Expert,

Can someone explain to me why this customer got over credit limit 147,023, 961.29?

For aging credit limit, we have a rule (only affected for invoices older than 3 months).
So in my opinion, the over credit limit value for customer above should be 150,123,141.47 - 141,720,000 = 8,403,141.47 not 147,023,961.29

Thanks,

Kinan