Regarding Price Effective Dates updating from Line Defaults Tab on Header onto the Detail

Hi,

I require clarification on below two cases.

1. New Order Creation using P4210--> After entering Header Data & saving, we get to see the Line Defaults Tab as attached in the image here. If I enter a date in PEFJ, it gets carried down to the Details Lines as well.
2. Existing Order Change using P4210--> Take an Order and go to header & Save, then comes Line Defaults Tab, update some date in PEFJ field. Then go to detail or save the Order. In this case we can see the changed PEFJ date is not updating on to the detail lines.