Advance search col3 not getting cleaned up issue

[neerajsingh0101]

select first_name at http://demo.neeraj.name/admin_data/user/advance_search the select 'contains' and type 'John' do a search. now in the second column select 'is null'. col3 still displays 'John' which is confusing. In cases when col3 is not applicable just set the value to empty spaces.