Issue with proration formula: The employee should not receive the balance

Summary:

The employee should not be receiving the balance, but it is still being generated. Could someone please help identify the issue in the Fast Formula provided below?

/*****************************************************************
FORMULA NAME: PRORATION
FORMULA TYPE: Global Absence Proration

DESCRIPTION: This sample formula applies the Accrual and Proration Factor
based on Length of Service and Accrual Plan the person enrolled into.
*****************************************************************/

/=========== DATABASE ITEM DEFAULTS BEGIN =====================/
DEFAULT for PER_ASG_REL_ORIGINAL_DATE_OF_HIRE is '4712/12/31 00:00:00' (date)
DEFAULT for ANC_ABS_PLN_NAME is 'A'
DEFAULT for ANC_ABS_PLN_PLAN_UOM is 'D'
/=========== DATABASE ITEM DEFAULTS ENDS======================/

/================ FORMULA SECTION BEGIN =======================/

INPUTS ARE IV_ACCRUALPERIODSTARTDATE (date), IV_ACCRUALPERIODENDDATE (date), IV_ACCRUAL (number)