Attendance Report question

Can anyone help?

When I run an attendance report and DO NOT include family work both of my daughters show the same number of days attended…but when I DO include family work it shows that one of them has one more day of attendance than the other. We have schooled them the same amount of days….does anyone know what I may have checked that causes this discrepancy of one day difference in attendance?

I’ve tried combing through a detailed report of this month as the extra day is in the month of October, but I’m not having any luck. Its just bugging me that the girls have schooled the exact same days and there is a one day difference showing when I include family work!

Thanks for any help!