Actually, it's worse than that. The leading zero causes Perl to interpret it as an octal value, so 037 becomes '31'. 

use Data::Dumper;

my %user_types =(
                 037 => [ 'member', '1' ],
                 165 => [ 'public', '2' ],
                 022 => [ 'staff', '3' ],
                 683 => [ 'babe', '4' ],
                 001 => [ 'old fart', '5' ]
              );
print Dumper( \%user_types );
__END__
$VAR1 = {
          '1' => [
                   'old fart',
                   '5'
                 ],
          '18' => [
                    'staff',
                    '3'
                  ],
          '165' => [
                     'public',
                     '2'
                   ],
          '683' => [
                     'babe',
                     '4'
                   ],
          '31' => [
                    'member',
                    '1'
                  ]
        };

[download]

In reply to Re^3: Best method to order a hash of arrays by kyle
in thread Best method to order a hash of arrays by punch_card_don

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