different modal getting the different result for the same query sql - php

Question

I don't know what's wrong with the code, but i get the different result for the same query.
My select query (in the controller):
$this->db->select('*');
$this->db->from('vendor_location');
$query = $this->db->get();
$data['location'] = $query->result_array();
My partial view (modal bootstrap):
<div class="modal fade" id="add_driver_modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">ADD DRIVER</h4>
</div>
<div class="modal-body" id='add'>
<div class="row" id="add_driver_form">
<?php var_dump($location);?>
</div>
</div>
<div class="modal-footer">
<button type="submit" class="btn btn-default" data-dismiss="modal">Close</button>
<button id="add" type="button" class="btn btn-primary btn-md" onclick=add_driver()>Add</button>
</div>
</div>
<div id="form_submit_result"></div>
</div>
</div>
<!-- Edit driver modal -->
<div class="modal fade" id="edit_driver_modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">EDIT DRIVER</h4>
</div>
<form method="post" action="<?php echo base_url(); ?>portal/edit_driver">
<div class="modal-body" id='add'>
<div class="row" id="edit_driver_form">
<?php var_dump($location);?>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button id="save" type="submit" class="btn btn-primary btn-md">Save</button>
</div>
</div>
</div>
</div>
When I var_dump($location) in the add_driver_modal, I get the expected result (all records from vendor_location table). But I just get the last record (one row) in the edit_driver_modal. How could this happen?