Entering absence hours on planned holiday

I need to allow absence hours to be entered on a planned holiday. We enter time via CATS. When I enter absence hours on a planned holiday, or on a non-planned work day, the hours entered is changed to 0. I need the system to accept the absence hours entered on a non-planned work day or holiday. When I enter attendance hours on a non-planned work day or holiday the system accepts the hours as entered.

Does the absence counting rules control this? I have the Condition for planned hours, planned hours = 0 and planned hours > 0 both checked for the absence in question.