You are right, it was a missprint, it is DOL1, DOL2, DOL3, etc.

And yes, numbered keys always goes on the bottom of the list (I think it's a consequence of using radio buttons which are seen as one "part")

One strange thing I've noticed when I moved this part out of CGI to a separate script and done a dump using Data::Dumper is that all of those numbered keys goes to a first hash ?!?

$VAR1 = {
          'FOR3' => 'Nej',
          'UID' => '',
          'DOL3' => 'Nej',
          'DOL1' => 'Nej',
          'FNA' => '',
          'MEX2' => 'Nej',
          'CMG1' => 'Ja',
          'CMG2' => 'Ja',
          'MEX1' => 'Nej',
          'DOL2' => 'Nej',
          'PRI3' => 'Nej',
          'spara' => 'Spara',
          'PRI1' => 'Nej',
          'ENA' => 'Exp-pri',
          'FOR1' => 'Nej',
          'MEX3' => 'Nej',
          'NYTT' => 23400,
          'FOR2' => 'Nej',
          'PRI2' => 'Nej',
          'PRE' => '(117)',
          'CMG3' => 'Ja'
        };
$VAR2 = {
          'UID' => 'FRLARS',
          'PRE' => '(0117)',
          'ENA' => 'Larsson',
          'NYTT' => 23403,
          'FNA' => 'Lars',
        };
$VAR3 = {
          'UID' => 'ANJA08',
          'PRE' => '(0117)',
          'ENA' => 'Daun',
          'NYTT' => 23404,
          'FNA' => 'Anja',
        };
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You have to tell Dumper that the element is an array-reference.   Otherwise, it will “flatten” the list for printout and dummy up those $VARn pseudo-names within Dumper’s own output.   But it’s only for its own printing purposes:   those names do not actually exist anywhere.