Payslip inflated absence accrual for re-hired employee

Summary:

We have re-hired an employee three times so her assignment number is such as (E123456-3), however, during each of their assignments they accrued some sick and vacation time and then was let go or they resigned. When they look at their payslip, they see their current accrual on their assignment plus all the accruals of their previous assignment. It looks like the payslip is using Person Number instead of Assignment Number to determine the Absence balance.

Is this standard functionality, if so, can we change it? The issue is that the employee is seeing inflated hours on the payslip when in reality they have much less.