End dating Eligibility in UI and through HDL have different effects

Summary:

I have 2 exactly similar elements. I end dated Eligibility for 1 through UI and for other through HDL.

UI end dates all existing element entries but HDL one doesn't

Content (required):

Very strange that behaviour not same. true for another thing that I cannot end date the element at all in UI as element entries exist but HDL just end dates the element. Then I end date the eligibility and turn out only the one end dated through UI end dating the element entries for all the employees. while HDL one has same effect on element configuration screen but has not end dated the element entries.