Production issue?

Hello Guru's,

While verifying intercompany Billing. In customer master xd03 the customer 10900 is defined under 1003/10/94; where as in the billing document created under same customer 10900 with a different SA 1003/30/94. Is it possible? Where as in the pricing procedure applied to the Billing it is picked a new pricing procedure, System is not generating any error. I had verified the pricing determination, conditions and condition records also all are correct, will anyone share your knowledge what would be the reason?.