title: Highcharts xAxis drilldown dont change correctly
body: <p><a href="http://jsfiddle.net/ZBXV7/2/" rel="nofollow">http://jsfiddle.net/ZBXV7/2/</a></p>
  
  <pre><code>when I click a column or label the xAxis write incorrect label but tooltip its ok.
  
  Where's the problem?
  </code></pre>