jQuery Grid Plugin - jqGrid

Within jqGrid 3.7.2 using JSON retrieved data, I have it load the parent objects initially and then it loads the children as the parents are expanded. This works properly. Upon trying to collapse the recently expanded parent the icon changes to the left of it, but the "child" data does not hide or disappear properly. When re-expanding the parent node it loads the data a second time thus repeating the children that already exist. Code I am using for this:

    jQuery('#assto_browser').jqGrid({
        width:500,
        height: 125,
        rowNum: 30,
        rowList: [30,50,100],
           colNames:['ID','Group Name','Sequence', 'Login ID'],
           colModel:[
                    {name:'id',index:'id', width:1,hidden:true,key:true},
               {name:'name',index:'name'},
               {name:'sequence',index:'sequence', sorttype:'int'},
               {name:'staffname',index:'staffname', align:'center'}
           ],
           ondblClickRow: function(rowid,iRow,iCol,e) {
                   OpenGridURL($('#list47').getCell(rowid,0));
               },
        treedatatype: "json",
            datatype: "json",
        mtype:"GET",
            url:'http://localhost:2810/GetGroupsAndStaffList.aspx',
            jsonReader : {
              root: "rows",
              page: "page",
              total: "total",
              records: "records",
              repeatitems: false,
              cell: "cell",
              id: "id",
              userdata: "userdata",
              subgrid: {root:"rows", repeatitems: true, cell:"cell"}
            },
        viewrecords:true,
            treeGridModel: 'adjacency',
            treeGrid: true,
        ExpandColumn : 'name',
           pager: '#assto_pager'

});

I am working on a time sensitive project, any immediate help would be appreciated.

Thank You,

Chris