Monthly Attendance report - WO ( weekly off) query

Hello All,

I updated the holiday list to include 2023 days last week. in our comapny the actual weekly day off are Friday and Saturday
However, since i updated the WO ,i noticed that for some reason Thursday and Sunday are showing as WO in the attendance sheet report.

I double checked and holiday list is correct. Company settings and the employees are linked to correct holiday list. i am not able to pinpoint the reason why thursday and sunday are showing as WO?

anyone can guide me what could be the reaons for this?