How to include the hours logged on Compensatory time on the calculation of limit?

I have Compensatory Plan that has a yearly limit of -24 hours balance. Upon doing some testing, on the absence record, even if the balance of the plan is already -24 hours, it will still accept logged absences. Upon checking on the plan details of the plan, I figured that the calculation of the limit will based on the Manual Adjustment logged and not on the compensatory time being logged.