jQuery Grid Plugin - jqGrid

I'm trying top have an initial table that fills from json as needed, but the rownumber resets when the json data is added.

Is it possible to keep the initial data and still have remote source?

    tableToGrid('#grid', {
        url:'/list.json',
        datatype: 'json',
        viewrecords: false,
        rownumbers: true,
        rownumWidth: 40,
        rowNum: 50,
        page: 1,
        pager: '#pgrps',
        gridview: true,
        scroll: true,
        mtype: 'GET',
        sortname: 'id',
        sortorder: 'desc',
        jsonReader: {
          repeatitems: false
       }
    });
    $("#pgrid").jqGrid('navGrid', '#pgrps', {edit:false,add:false,del:false}, {}, {}, {}, {multipleSearch:true, multipleGroup:true});