In Oracle Payables, in the Supplier Entry Page, using oracle.apps.pos.supplier.server.SitesVORowImpl

In Oracle Payables, in the Supplier Entry Page, using oracle.apps.pos.supplier.server.SitesVORowImpl getRowChanged() get unchanged sites for custom class that

extends ByrMngSitesCO

I want to mark only changed rows in Supplier Entry Page using oracle.apps.pos.supplier.server.SitesVORowImpl getRowChanged() in logic, and find that unchanged sites in Page are being market as getRowChanged() is getting as changed using it, the problem seams to be when sites have the same party_site_id in ap_supplier_sites_all

Please let me know if there is any bug or it is wrong use oracle.apps.pos.supplier.server.SitesVORowImpl getRowChanged() in the Supplier Entry Page to find changed sites extending ByrMngSitesCO