Over-planning with SNP heuristics

Hi,

           There is excess planned receipts getting created as planned orders during the SNP location heuristics run in the background. This does not happen during the interactive location heuristics run executed in the APO planning book. We run the SNP location heuristics at a product master attribute brand level that is unique for a product. This issue is only occuring for products using the standard out-of-the box shelf life SAP functionality. Does anybody know why the receipts are created in excess?

Thanks,

Sandy