Planned Order Date in MF50

Hi,

I am opening MF50 for a material with weekly periods and manually add a planned order for 1030 pcs in week 29 (13-Jul-2020).

When I double click on the newly entered 1030 pcs to view the newly added planned order, it shows Finish Date 19-Jul-2020 (SUNDAY), see screenshots, but I expect it to show 13-Jul-2020. What do I need to change so that when I enter quantities in weekly view, they will appear on MONDAYS?

Thank you