I should have been clearer in my initial post.sorry!
This is a question of how to deal with two hash's with the same value. Not a case of having to values in a hash.

How can i handle repeated data in my hashes? Both HOH or %hash.

Here is a sample hash:

$students{"Sally Cummings"}=(
        {
                "year"=>"1",
                "GPA"=>"3.3",
                "major"=>"Undecided",
                "email"=>"scummings\@school.edu"
        }
[download]

Here is a sample HOH:

%students = ();
$students{"Nick Plato"}=(
        {
                "year"=>"2",
                "GPA"=>"2.5",
                "major"=>"Phys. Ed.",
                "email"=>"nplato\@school.edu"
        }
);


$students{"Mary Pitts"}=(
        {
                "year"=>"4",
                "GPA"=>"4",
                "major"=>"Economics",
                "major"=>"Economics",
                "email"=>"mpitts\@school.edu"
        }
);

$students{"Sally Cummings"}=(
        {
                "year"=>"1",
                "GPA"=>"3.3",
                "major"=>"Undecided",
                "major"=>"Undecided",
                "email"=>"scummings\@school.edu"
        }
$students{"Sally Cummings"}=(
        {
                "year"=>"1",
                "GPA"=>"3.3",
                "major"=>"Undecided",
                "major"=>"Undecided",
                "email"=>"scummings\@school.edu"
        }
);
[download]

Look at the above examples closely for all repeated stuff.