Credit limit check on invoicing for multiple shipments

Hi

The company I work for is using Sage 300 ERP 2014 PU2 Order Entry (OE) with active credit limit on customers.
I face a problem when I create an invoice for multiple shipments, as below sample:

Credit Limit : 200,000
OE Pending Balance: 150,000 (consist of 3 shipments @50,000)
at this stage the customer is still under limit

When I create an invoice for those three shipments it raises a credit checker message saying that the customer is over
credit and asking for credit limit approval:

Credit Limit : 200,000
OE Pending Balance: 100,000 (it should be 0)
Current invoice : 150,000
Total Outstanding Balance: 250,000
Credit Limit Exceeded By:50,000

Seems that the Credit Checker consider only one shipment to deduct the OE Pending Balance.

Appreciate for any help, advice or experience sharing about this problem

Thank you
Ridwan