jQuery Grid Plugin - jqGrid

I have this php code for counting the number of pages

and retrieve data from database, but something is going wrong

with the pager as i can see.

Specifically i think that there is a problem with the json file structure.

Here is the php code:

public function getLogsList($page,$limit,$sidx,$sord)
    {
        init_mysql();

        $return_array = array();
        $row_array = array();

        // Getting pages number (for jqGrid pager)

        if(!$sidx) $sidx =1;
        $result = mysql_query("SELECT COUNT(*) AS count FROM logs");
        $row = mysql_fetch_array($result);
        $count = $row['count']; 

        if( $count >0 ) {
            $total_pages = ceil($count/$limit);
        } else {
            $total_pages = 0;
        }

        if ($page > $total_pages) $page=$total_pages;
        $start = $limit*$page - $limit;

        $row_array['page'] = $page;         
        $row_array['total'] = $total_pages;
        $row_array['records'] = $count;

        array_push($return_array,$row_array);

        // Getting data for jqGrid table

        $data =  mysql_query("SELECT * FROM logs ORDER BY log_id DESC");

        if(mysql_num_rows($data))
        {
            while($row = mysql_fetch_array($data)) 
            { 

                $row_array['log_id'] = $row['log_id'];          
                $row_array['ip'] = $row['ip'];
                $row_array['hostname'] = $row['host'];
                $row_array['log'] = $row['input'];
                $row_array['date'] = $row['date'];

                array_push($return_array,$row_array);
            }   
        }

        echo json_encode($return_array);
    }

The json file looks like this :

[{"page":"1","total":2,"records":"34"},{"page":"1","total":2,"records":"34","log_id":"108","ip":"127.0.0.1","hostname":"","log":"having 1=1","date":"09-06-2013 22:05:57"},{"page":"1","total":2,"records":"34","log_id":"107","ip":"127.0.0.1","hostname":"","log":"//","date":"09-06-2013 22:05:57"},.....}]

as you can see page , total and records are printed each time and

that why i think that something is going wrong with the structure of json file.

Is there any way to fix it ?

Thanks.