[ jQuery/Datatable ]: datatables not responsive, disable an input search

I follow the example on the jQuery DataTables in order to make a datatable with select input search.

Here's my html code example:

<div class="jumbotron">
<table id="dataTables" class="display" cellspacing="0" width="100%">
        <thead>
        <tr>
          <th>Référence</th>
          <th>Activité(s)</th>
          <th>Parc immobilier</th>
          <th>Nom du Bâtiment</th>
          <th>Ensemble</th>
          <th></th>
        </tr>
      </thead>
      <tfoot>
        <tr>
          <th>Référence</th>
          <th>Activité(s)</th>
          <th>Parc immobilier</th>
          <th>Nom du Bâtiment</th>
          <th>Ensemble</th>
          <th></th>
        </tr>
      </tfoot>
      <tbody>
        {% for batiment in batiment %}
          <tr>
            <td>{{ batiment.referencebatiment }}</td>
            <td>
              {% for batiment in batiment.typesactivite %}
                {{ batiment.type }}
                <br>
              {% endfor %}
            </td>
            <td>{{ batiment.ensembles.parcsimmobilier }}</td>
            <td>{{ batiment.nom }}</td>
            <td>{{ batiment.ensembles }}</td>
            <td><a href=""><button class="btn btn-edit btn-xs sharp">Modifier</button></a></td>
          </tr>
        {% endfor %}
        </tbody>
      </table>
    </div>

So here's my javascript code for datatables:

$(document).ready(function() {
    $('#dataTables').DataTable( {
        responsive: true,
        //enlever la recherche sur une colone, ici la colone 2 et 4 => Office et Date. Attention 0 est une valeur, les colones commencent donc à partir de 0
        "aoColumnDefs": [
        { "bSearchable": false, "aTargets": [ 5 ] }],
        //
        //langue française
        "language": {
            "sProcessing":     "Traitement en cours...",
            "sSearch":         "Rechercher :",
            "sLengthMenu":     "Afficher _MENU_ éléments",
            "sInfo":           "Affichage de l'élement _START_ à _END_ sur _TOTAL_ éléments",
            "sInfoEmpty":      "Affichage de l'élement 0 à 0 sur 0 éléments",
            "sInfoFiltered":   "(filtré de _MAX_ éléments au total)",
            "sInfoPostFix":    "",
            "sLoadingRecords": "Chargement en cours...",
            "sZeroRecords":    "Aucun élément à afficher",
            "sEmptyTable":     "Aucune donnée disponible dans le tableau",
            "oPaginate": {
                "sFirst":      "Premier",
                "sPrevious":   "Précédent",
                "sNext":       "Suivant",
                "sLast":       "Dernier"
            },
            "oAria": {
                "sSortAscending":  ": activer pour trier la colonne par ordre croissant",
                "sSortDescending": ": activer pour trier la colonne par ordre décroissant"
            }
        },
        initComplete: function () {
            var api = this.api();
            api.columns().indexes().flatten().each( function ( i ) {
                var column = api.column( i );
                var select = $('<select><option value=""></option></select>')
                    .appendTo( $(column.footer()).empty())
                    .on( 'change', function () {
                        var val = $.fn.dataTable.util.escapeRegex(
                            $(this).val()
                        );
                        column
                            .search( val ? '^'+val+'$' : '', true, false )
                            .draw();
                    });
                column.data().unique().sort().each( function ( d, j ) {
                    select.append( '<option value="'+d+'">'+d+'</option>' );
                });
            });
        }
    });
});

Like you can see, I change the language in french, and disable search for colums 5, because I don't want allow user to make a search based on this colum. So the language changement and the disable search on the column 5 work really good.

Why my datatables don't display correctly. It's not collapsing well with bootstrap responsive design? How can I disable a search from a column (no input text or select in my tfoot under a column?

How can I do it?

Thank you for the help.