Is his membership record still in the ward? I'm pretty sure the data comes from the church's mission system and not something directly controlled by the local leaders. It may have something to do with where his mission papers where submitted, or if his family moved since going on a mission. I'd contact the missionary department to work on updating the records.
Have you searched the
Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
So we can better help you, please edit your
Profile to include your general location.