Saving repeating fileds

My plugins options page has repeating fields for one of the settings. I have the repeating part working but I cannot get the fields to save.

public function add_mimes_callback() {
  $option       = $this->ordered_uploads_options;
  $mimes        = $option[OU_PL_PREFIX . '_mimes'];
  $mime_folders = $this->mime_folders();
  ?>
  <script type="text/javascript">
    jQuery(document).ready(function($){
      $('#add-row').on('click', function() {
        var row = $('.empty-row.screen-reader-text').clone(true);
        row.removeClass('empty-row screen-reader-text');
        row.insertBefore('#repeatable-fieldset-one tbody>tr:last');
        jQuery('input, select', row).val('').attr('name', function(index, name) {
          return name.replace(/(\d+)/, function(fullMatch, n) {
            return Number(n) + 1;
          });
        });
        return false;
      });
      $('.remove-row').on('click', function() {
        $(this).parent().parent().remove();
        return false;
      });
    });
  </script>
  <table id="repeatable-fieldset-one" width="100%">
    <thead>
      <tr>
        <th>Extention</th>
        <th>Filetype</th>
        <th>Folder</th>
        <th></th>
      </tr>
    </thead>
    <tbody>
    <?php
      $counter = 1;
      if( $mimes ) {
        foreach( $mimes as $mime ) {
          $counter++;
          $extention = $option[$mimes]['ou_mime_extention_' . $counter];
          $filetype  = $option[$mimes]['ou_mime_filetype_' . $counter];
          $folder    = $option[$mimes]['ou_mime_folder_' . $counter];
          ?>
          <tr>
            <td>
              <input type="text" name="ou_options_settings['ou_mimes']['ou_mime_extention_<?php echo $counter; ?>']" value="<?php echo $extention; ?>" class="all-options">
            </td>
            <td>
              <input type="text" name="ou_options_settings['ou_mimes']['ou_mime_filetype_<?php echo $counter; ?>']" class="all-options">
            </td>
            <td>
              <select name="ou_options_settings['ou_mimes']['ou_mime_folder_<?php echo $counter; ?>']">
                <?php foreach ( $mime_folders as $label => $value ) : ?>
                  <option value="<?php echo $value; ?>"<?php selected( $field['select'], $value ); ?>><?php echo $label; ?></option>
                <?php endforeach; ?>
              </select>
            </td>
            <td>
              <a class="button remove-row" href="#">Remove</a>
            </td>
          </tr>
          <?php
        }
      } else {
        ?>
        <tr>
          <td>
            <input type="text" name="ou_options_settings['ou_mimes']['ou_mime_extention_1']" class="all-options">
          </td>
          <td>
            <input type="text" name="ou_options_settings['ou_mimes']['ou_mime_filetype_1']" class="all-options">
          </td>
          <td>
            <select name="ou_options_settings['ou_mimes']['ou_mime_folder_1']">
              <?php foreach ( $mime_folders as $label => $value ) : ?>
                <option value="<?php echo $value; ?>"><?php echo $label; ?></option>
              <?php endforeach; ?>
            </select>
          </td>
          <td>
            <a class="button remove-row" href="#">Remove</a>
          </td>
        </tr>
        <?php
      }
      ?>
      <tr class="empty-row screen-reader-text">
        <td>
          <input type="text" name="ou_options_settings['ou_mimes']['ou_mime_extention_1']" class="all-options">
        </td>
        <td>
          <input type="text" name="ou_options_settings['ou_mimes']['ou_mime_filetype_1']" class="all-options">
        </td>
        <td>
          <select name="ou_options_settings['ou_mimes']['ou_mime_folder_1']">
            <?php foreach ( $mime_folders as $label => $value ) : ?>
              <option value="<?php echo $value; ?>"><?php echo $label; ?></option>
            <?php endforeach; ?>
          </select>
        </td>
        <td>
          <a class="button remove-row" href="#">Remove</a>
        </td>
      </tr>
      <?php
    ?>
    </tbody>
  </table>
  <p><a id="add-row" class="button" href="#">Add Mime</a></p>
  <?php
} // end mime_repeater

Here’s a link to the full code Gist

I’ve been trying to get this to work for days. Unfortunately, I can’t find very much on repeatable fields, so If any one can help me out I’d really appreciate it.