I don't get the same output as you do. Here is what I get:

All accounted for:
$VAR1 = {
          'one' => [
                     '1'
                   ],
          'twelve' => [
                        '12'
                      ],
          'two' => [
                     '2'
                   ]
        };
Here too:
$VAR1 = [
          '12',
          '1',
          '2'
        ];
Where are one and two?
$VAR1 = {
          'one' => '1',
          'twelve' => '12',
          'two' => '2'
        };
[download]

What version of perl are you using? I'm on v5.10.1, MSWin32-x86-multi-thread.