title: Datatable child row not appearing in first column when in responsive mode
body: <p>I'm not sure what I am doing wrong here but when I click on the details contro,. the child row is dsiplayed but it pushed to a new column at the end of the data table.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>&lt;div class="col-xs-4"&gt;
  &lt;table id="exp_datatable" class="display "&gt;
      &lt;thead&gt;
          &lt;tr&gt;
              &lt;th&gt;AccountNumber&lt;/th&gt;
              &lt;th&gt;AccountCostCentre&lt;/th&gt;
              &lt;th&gt;AccountDepartment&lt;/th&gt;
              &lt;th&gt;Narrative&lt;/th&gt;
              &lt;th&gt;TransactionAnalysisCode&lt;/th&gt;
              &lt;th&gt;TaxType&lt;/th&gt;
              &lt;th&gt;TaxCode&lt;/th&gt;
              &lt;th&gt;Amount&lt;/th&gt;
          &lt;/tr&gt;
      &lt;/thead&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p></p>
  
  <pre><code>&lt;script&gt;   
  
      $(function() {
  
          $tepTable = $('#exp_datatable').DataTable ( {
              ajax: { // doing it this way allows me to invoke ajax.reload
                  url: '../ajax/transactions.php',
                  type: 'POST',
                  data: {action:'get export preview'},
                  dataType: 'json',
                  dataFilter: function(data){
                      var jData = JSON.parse(data);
                      var dtData =JSON.stringify( {"data": jData});
                      return dtData;
                  }
              },
              responsive: true,
              columns: [
                          { data: "nom_code" },
                          { data: "account_cost_centre" },
                          { data: "account_dept" },
                          { data: "narrative" },
                          { data: "trans_analysis_code" },
                          { data: "tax_type" },
                          { data: "tax_code" },
                          { data: "amount" }
              ]
          });       
      });
  
  
  &lt;/script&gt;
  </code></pre>
  
  <p>My table looks like this:
  <a href="https://i.stack.imgur.com/u0kmC.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/u0kmC.jpg" alt="enter image description here"></a></p>
  
  <p>And here it is with the child row displayed:
  <a href="https://i.stack.imgur.com/9GbWF.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9GbWF.jpg" alt="enter image description here"></a></p>
  
  <p>I'm really stuck so any help is very much appreciated. Thank you,</p>
  
  <p>Lee</p>