data-autobind on grid not working

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.913/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.913/styles/kendo.metro.min.css">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script src="http://cdn.kendostatic.com/2012.2.913/js/kendo.all.min.js"></script>
<div id='container'>
    <div data-scrollable='false' data-role='grid' data-height='436px' data-bind='source:itemsDS' data-pageable='true' data-autobind='false'></div>
  
</div>
  <div class="border"></div>
    <button data-bind='click:loadData'>Load</button>

CSS

.border {display: block; height: 30px; background: black}

JavaScript

var testData = [{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
},{
    ID: 1,
    Name: 'Item 1',
    ExtraData: 'Extra Stufff 1',
    CorrectAnswer: 1
}, {
    ID: 2,
    Name: 'Item 2',
    ExtraData: 'Extra Stufff 2',
    CorrectAnswer: 2
}];

var...