[balinor]

Remove all this from customer/main/customer_details.tpl:

{foreach from=$userinfo.additional_fields item=v}{if $v.section eq 'C' || $v.section eq 'P'}
  {$v.title}:              {$v.value}
{/if}{/foreach}

{foreach from=$userinfo.additional_fields item=v}{if $v.section eq 'B'}
  {$v.title}:              {$v.value}
{/if}{/foreach}

{foreach from=$userinfo.additional_fields item=v}{if $v.section eq 'S'}
  {$v.title}:              {$v.value}
{/if}{/foreach}{assign var="is_header" value=""}
{foreach from=$userinfo.additional_fields item=v}{if $v.section eq 'A'}
{if $is_header ne 'Y'}
 
{$lng.lbl_additional_information}:
-----------------
{assign var="is_header" value="Y"}{/if}
 {$v.title}:               {$v.value}
{/if}{/foreach}