deduction of all the leavs carry over in next time evaluation

Hi ,

When we are running the time evaluation for next accrual period the deduction of ALL THE LEAVES that empl got till now carry over to next accrual period.

e.g:

Quota acrula period is july to June

employee us having quota 07/01/2010 to 06/30/2011---- 208 hrs

quota used 40 hours

balance quota -152 hrs

next accrual ;- 07/01/2011 to 06/30/2012

quota genratd ---248 hrs.( current 208 + previous 40 hrs Leaves taken by employee)

Please tell me how to resolve this issue.