Profile option PO: Use Document GL Date to Unreserve is not working

Hello

I have set the profile option PO: Use Document GL Date to Unreserve at site level so it can do all its unrservation of Encumbrance at the PO's or REQ's GL Date.

And I even put a personalization on it so users can't uncheck this feauture during Cancelling or Finaly Closing or  unreserving of one PO or REQ. But I am seeing PO and REQ

that are unreserved in different period of their GL Date. What is happening?

Please help

Meron