Hi,
the PP/DS optimizer reads things its own way before optimizing, therefore you have to test it independently of what you see in say /SAPAPO/RRP3 (one example would be pegging, wich is reinterpreted by the internal code). Did you try it in your sandbox?
2 is "allways passed from product", as in your link, " " is "for mto, ese from product".
regards,
J.