Peoplesoft voucher's shows voucher's last modifier name and not the voucher's approval name

The name showing on the voucher is the last person that worked on the voucher example the specialist that works on posting of vouchers. Instead of showing the name of the approval of the voucher. Before the upgrade to PeopleSoft 9.2, the voucher's approval name shows on the voucher irrespective of whatever is done to the voucher like posting after approval