We updated the appointment logic to subtract the Billing After Minutes first and then round up to the nearest billing interval.
For service levels that have the Round Minutes by Day option set to YES (Setup > Operations > Service Levels), the Managely will deduct the Billing After Minutes from the first (earliest dated) day and then round up. Any remaining days will then only be rounded up and added to get the total billable minutes. The system will then allocate the total billable minutes to each individual appointment.