Datatables Column Header not aligned (IE11)

by Redburn

HTML

<script src="//code.jquery.com/jquery-1.12.4.js"></script>
<script src="//cdn.datatables.net/1.10.13/js/jquery.dataTables.min.js"></script>
<link rel="stylesheet" href="//cdn.datatables.net/1.10.13/css/jquery.dataTables.min.css">
<script src="//cdn.datatables.net/fixedcolumns/3.2.2/js/dataTables.fixedColumns.min.js"></script>
<link rel="stylesheet" href="//cdn.datatables.net/fixedcolumns/3.2.2/css/fixedColumns.dataTables.min.css">
<table id="example" class="diplay cell-border">
  <thead>
    <tr>
      <th rowspan="2">Name</th>
      <th rowspan="2">Value (in Mio EUR)</th>
      <th rowspan="2">Chg. Value vs. Year Ago (in Mio EUR)</th>
      <th rowspan="2">% Chg. Value vs. Year Ago</th>
      <th colspan="2">Weight. Distr.</th>
      <th colspan="2">Rate of Sales in Value (4w) (in EUR)</th>
      <th colspan="2">No. of Items per Store</th>
      <th colspan="2">Importance of Sales Value under Promotion (in %)</th>
    </tr>
    <tr>
      <th>Last</th>
      <th>Pts Ev.</th>
      <th>Last</th>
      <th>% Ev.</th>
      <th>Last</th>
      <th>% Ev.</th>
      <th>Last</th>
      <th>Pts Ev.</th>
    </tr>
  </thead>
  
  <tbody>
    <tr>
      <td>ITM DATASHARING P&amp;G LOT 1</td>
      <td>38.72</td>
      <td>-4.92</td>
      <td>-11.29</td>
      <td>100</td>
      <td>0</td>
      <td>1768.93</td>
      <td>-11.32</td>
      <td>190.34</td>
      <td>-3.07</td>
      <td>17.57</td>
      <td>-1.57</td>
    </tr>
    <tr>
      <td>071 LAVAGE DU LINGE ASSOUPLISSANT</td>
      <td>1.90</td>
      <td>0.54</td>
      <td>40.65</td>
      <td>99.96</td>
      <td>0.24</td>
      <td>86.90</td>
      <td>40.24</td>
      <td>10.91</td>
      <td>16.83</td>
      <td>41.94</td>
      <td>23.67</td>
    </tr>
    <tr>
      <td>071 LAVAGE DU LINGE AUXILIAIRES DE LAVAGE</td>
      <td>0.22</td>
      <td>-0.04</td>
      <td>-17.58</td>
      <td>99.57</td>
      <td>0.04</td>
      <td>10.38</td>
      <td>-17.64</td>
      <td>2.71</td>
      <td>-3.12</td>
   ...

JavaScript

$('#example').DataTable({
        scrollY: 300,
        scrollX: '100%',
        fixedColumns: {
            leftColumns: 1,
            rightColumns: 0,
        }
    });