Annual leave

Hi,

Hoping the brains trust here can help. I have an employee who 'cashed in' some leave. I processed his normal pay. I then processed a second pay (adjusting the dates by 1 day) entering 38 hours annual leave, 38 hours leave loading & 0 base hours. Unfortunately his leave balance has not reduced at all, simlarly his YTD $value for AL has not inreased. I have double checked other employees and their balances have adjusted accordingly. For the particular employee in question, his balance has reduced when I have processed leave as part of a standard pay, eg he had a day of sick leave and his P/L balance was reduced by 7.6hrs as it should have.

Has the issue come about because I have effectively processed 2 pays in the one week for him? 

Why have the balances not adjusted automatically as they should have?

Is there a different wasy I should be entering details to 'cash in leave'?

Thanks :)