Yii中CGridView上的额外Ajax

Question

I'm quite new with Yii and I'm dealing with the CGridView which is causing me troubles.

This CGridView is in a renderPartial view.

$this->widget('zii.widgets.grid.CGridView', array(
'id'=>'ratesGrid',
'dataProvider'=>rates::model()->searchSameProperty($propertyid),
'columns'=>array(
    'name',
    'from',
    'to',
    'price',
    array( 
    'header'=>'html',
    'type'=>'raw',
    'value'=>'\'
       <a href="#" class="deleteRate btn btn-danger" data-rateid="\'.$data->id.\'">Delete Rate</a>
       \'', 
    ),
),));

Yii::app()->clientScript->registerScript('ratesdeletion', '
$("#ratesProperty").on("click", ".deleteRate", function(e){
    e.preventDefault();
    $.ajax({
        "url":"'.CController::createUrl('rates/delete').'",

            "type":"POST",
            "data":{
                "id":$(this).data("rateid"),
            },
            "success":function(data){
                $.fn.yiiGridView.update("ratesGrid");
            },

    });
});
', CClientScript::POS_END);

The good part is when I click the delete button, it makes the call to "rates/delete" with the correct id, but when "rates/delete" finishes its work, somehow another AJAX call is made (that I've never coded), please check the screenshot.

So my questions are:

1. Why Yii is creating this second ajax call that I've never created?

2. How can I avoid this second ajax call?

EDIT:

I tried adding an anchor and then attach the ajax call in a click event and it keeps making the second call.