Back flushing at routing level operation

dear all hi,

I have 10 components in a bom & while assigning these components in routing operations i have maintained backflushing tick, but when i create production order, the system is displaying bf indicator for only 3 components.

I have checked mat master & workcenter, in these it is not maintained, i want to control from routing operation level & more over it is displaying for 3 comps but not for others, please help how to make it for all comps in prd ord.

thanks in advance