LP Retroactively Accruing Overtime

We are having an issue when running LP140 for terminated employees before paying out their LP31 balance.  The LP140 is going back and re-opening the employees previously closed overtime service records from that were created by PR132.  It does not do this with the employee's regular time service records, only the ones created by PR132.  The service codes are all set up the same so we can't figure out why the overtime records would be retroactively accruing?  Where should we begin to look?