Whenever I add this widget to multiple widget areas, the later ones doesn’t save at all.
Am I doing somethoing wrong.

Here is my code for my piklist widget:

social-link-form.php

 <?php
piklist('field', array(
  'type' => 'text',
  'field' => 'widget_title',
  'label' => 'Title'
));
piklist('field', array(
  'type' => 'group',
  'field' => 'social_media_container',
  'label' => '',
  'fields' =>
  array(
      array(
      'type' => 'group',
      'field' => 'single_social_media',
      'label' => '',
      'add_more' => true,
      'fields' => array(
      	array(
          'type' => 'select',
          'field' => 'social_icon',
          'label' => 'Social Media',
          'columns' => 4,
          'choices' => array(
            '' => 'Select',
            'facebook' => 'Facebook',
            'twitter' => 'Twitter',
            'linkedin' => 'LinkedIn',
            'google+' => 'Google+',
            'behance' => 'Behance',
            'pinterest' => 'Pinterest'
          )
  			),
        array(
          'type' => 'text',
          'field' => 'social_link',
          'label' => 'Link',
          'columns' => 8,
        )
      )
		)
	)
));

?>

social-link.php

<?php
/*
Title: Social Links
*/
?>
<div class="footer-social-item single-footer">
<ul><?php foreach($settings['social_media_container']['single_social_media'] as $social_list) { echo '<li><a target="_blank" href="'.$social_list['social_link'].'"><i class="fa '.$social_list['social_icon'].'"></i></a></li>'; } ?></ul>
</div>