It would be easier if i could just display them without having to group the fields to get them to show.

but whenever I ungroup the fields it will only display the last ‘ungrouped’ group
not sure if this is a bug or if there is a way around this – ive tried absolutely everything with the options to get them to show.

It works if I only want one ungrouped group on one settings page
if i add two to the same page it renders the 2nd and not the 1st.

   piklist('field', array(
    'type' => 'group'
    ,'label' => '1st'
    ,'description' => 'An Un-grouped field. Data is saved as individual meta and is searchable.'
    ,'fields' => array(
      array(
      'type' => 'text'
      ,'field' => 'custom_h1'
      ,'label' => 'H1 Size'
      ,'description' => 'class="regular-text"'
      ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
      ,'columns' => 2
      )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h2'
    ,'label' => 'H2 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
     )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h3'
    ,'label' => 'H3 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
      )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h4'
    ,'label' => 'H4 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
     )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h5'
    ,'label' => 'H5 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
    )
    )
  ));
  
     piklist('field', array(
    'type' => 'group'
    ,'label' => '2nd'
    ,'description' => 'An Un-grouped field. Data is saved as individual meta and is searchable.'
    ,'fields' => array(
      array(
      'type' => 'text'
      ,'field' => 'custom_h1'
      ,'label' => 'H1 Size'
      ,'description' => 'class="regular-text"'
      ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
      ,'columns' => 2
      )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h2'
    ,'label' => 'H2 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
     )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h3'
    ,'label' => 'H3 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
      )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h4'
    ,'label' => 'H4 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
     )
    ,array(
    'type' => 'text'
    ,'field' => 'custom_h5'
    ,'label' => 'H5 Size'
    ,'description' => 'class="regular-text"'
    ,'help' => 'You can easily add tooltips to your fields with the help parameter.'
    ,'columns' => 2
    )
    )
  ));

Sorry my fault for pasting the previous code in a hurry.

I’ve tried this in a brand new install using the latest version of piklist and the demo’s enabled.
the code i used is a modified version of piklist-demo group tab in settings
please let me know if this works for you?

<?php
/*
Title: Field Groups
Setting: piklist_demo_fields
Tab: Groups
Tab Order: 40
Order: 30
*/

  
  piklist('field', array(
    'type' => 'group'
    ,'label' => '1st Address (Un-Grouped)'
    ,'description' => 'An Un-grouped field. Data is saved as individual meta and is searchable.'
    ,'fields' => array(
      array(
        'type' => 'text'
        ,'field' => 'ungrouped_address_1'
        ,'label' => '1st Street Address'
        ,'columns' => 12
      )
      ,array(
        'type' => 'text'
        ,'field' => 'ungrouped_address_2'
        ,'label' => 'PO Box, Suite, etc.'
        ,'columns' => 12
      )
    )
  ));

    piklist('field', array(
    'type' => 'group'
    ,'label' => '2nd Address (Un-Grouped)'
    ,'description' => 'An Un-grouped field. Data is saved as individual meta and is searchable.'
    ,'fields' => array(
      array(
        'type' => 'text'
        ,'field' => 'new_ungrouped_address_1'
        ,'label' => '2nd Street Address'
        ,'columns' => 12
      )
      ,array(
        'type' => 'text'
        ,'field' => '2nd new_ungrouped_address_2'
        ,'label' => 'PO Box, Suite, etc.'
        ,'columns' => 12
      )
    )
  ));

  piklist('shared/code-locater', array(
    'location' => __FILE__
    ,'type' => 'Meta Box'
  ));
  
?>