Muliple server side call on initial page load

nehab17

We are using server side datatable processing and passing following options:

                   "bStateSave": true,
           "bJQueryUI": true,
           "bProcessing": true,
           "bServerSide": true,
           "sAjaxSource": "/proj/getServerData",
           "sServerMethod":"POST", 
           "bLengthChange": true,
           "bDeferRender": true,
           "bSortClasses":false,
           "iDisplayLength":25,
           "bFilter": true,            
           "bInfo": true,
           "bDestroy": true,
           "sScrollX": "100%",            
           "sScrollY": "250px",
           "bScrollCollapse": true,
           "sPaginationType": "full_numbers",
           "aLengthMenu": [[ 25, 50,100, -1], [ 25, 50,100, "All"]

and its sending two request to server with same parameters except sEcho, we are not able to understand why its sending two request to server on initial page load.

Any help would be greatly appreciated. Thanks!