Issues with confirming Military Status

I'm trying to set up the Military Discount for my father's account.  The billing is in his name but I set up his xFinity account since he's not technologically savvy.  When I attempt to confirm his military status it pre-populates with my name and I'm unable to change it to his name on that page.  I recently made changes to his overall account to make sure that his name is listed as the user but that hasn't helped with the 'confirm military status' page.  Any suggestions?