Employee Final Pay

Hi,

I have just processed one of my employees final pays and he has a question that I am not sure about. On his payslip the week before the final pay it showed a balance of leave paid of -40hrs and accrued leave of 62.31  hours. But, on his final payslip -40hours being netted against his  accrued leave. However, the accrued leave paid ot only works out to be about 49 hours, not the 62 hoursthat he had accrued per the prior week?

Can any one make sense of this for me??

Thanks