mto with strategy 50

hi

i am working on strategy 50 for mto scenario.

while converting sfg plan order into prod. order raw material procurement (purchase requisition) is generate. when i done gr against purchase order for raw material it directly consumed for sfg material without doing issue task. is it a standard process ?

actualyy i want raw material to be keep in stock, as i have maintained first operation with PP02 cntrl key for subcontracting process.

because of earlier setting when i create MM guy create po wrt purchase requisition for subcontracting, bom is not exploded as system having no stock (as it already consume for sfg material)

please help me.