Sales account credits for internal sourced items.

We are a Organization with multiple Plants using multi level Bill of materials.  During our invoice run the incorrect sales accounts are being credited.  Example  Selling Part number ABC at Org 1,  Org 1 gets a widget used in ABC from Org 2, Org 2 ships against an internal sales order to Org 1,  Org 1 completes a discrete job for ABC and ships to customer.   When ABC is invoiced Org 2 is credited for Sales of widget, Org 1 is credited for the remaining balance of total price of ABC.   How do I stop this?  We want Org 1 to get full sales credit.