jQuery Grid Plugin - jqGrid

Hello all, I hope someone can help me.  I have a grid with scroll set to 1 for endless scroll.  occasionally it's making one final call to the webservice to grab the same final rows.  When regular paging is used, this does not happen.  After debugging, it is indeed making the same exact final call 2 times and appending those results.  My code is below.  Currently there is no sorting implemented.

I am wondering why there is no code snippet option on this forum.

Javascript

function InitializeJQGridEP()
 {
     var AuthID = "";
     if (CurrentAuthorized != null)
         AuthID = CurrentAuthorized.ID;
     $("#EPTable").jqGrid({
         datatype: 'json',
         url: URL,
         postData: { AuthorizedID: AuthID },
         mtype: 'GET',
         colNames: ['Item', 'Permission', 'Authorization', 'Set On', ''],
         colModel: [
                        { name: 'SecurableName', index: 'SecurableName' },
                        { name: 'PermissionName', index: 'PermissionName', width: 220 },
                        { name: 'Authorization', index: 'Authorization', classes: 'epAuthorization' },
                        { name: 'AuthorizedName', index: 'AuthorizedName', Width: 260 },
                        { name: 'AuthorizedID', index: 'AuthorizedID', width: 15, classes: 'EP_Goto' }
                          ],
         jsonReader:
                    {
                        root: function (obj) { return obj.d.rows; },
                        total: function (obj) { return obj.d.total; },
                        page: function (obj) { return obj.d.page; },
                        records: function (obj) { return obj.d.records; }
                    },
         rowNum: 12,
         scroll: 1,
         gridview: true,
         pager: '#EPPager',
         viewrecords: true,
         recordtext: "{2} Effective Permissions",
         loadtext: "Retrieving Effective Permissions..",
         emptyrecords: "No Effective Permissions!",
         sortname: 'SecurableName',
         sortorder: "asc",
         width: Width,
         height: Height,
         onSelectRow: EPRowSelected,
         loadui: 'block',
         altRows: true,
         altclass: "alt",
         gridComplete: EPGridComplete
     });
 
     $("#EPTable").jqGrid('navGrid', '#EPPager',
            { edit: false, add: false, del: false, refresh: false },
            {},
            {},
            {},
            { closeOnEscape: true, multipleSearch: false, closeAfterSearch: true });
 }

Webservice

        public jqGrid GetEffectivePermissions(int? page, int? rows, string sidx, string sord, bool? _search, string searchField, string searchString, string searchOper, string AuthorizedID)
        {
            string sortExpression = string.Format("{0} {1}", sidx, sord);
            List<ISecurableAuthorization> permissions = new List<ISecurableAuthorization>(); ;
            int TotalEntries=0;
            if (string.IsNullOrEmpty(AuthorizedID))
            {           
                TotalEntries = permissions.Count;
            }
            else
            {
                try
                {
                    Guid AuthID = new Guid(AuthorizedID);
                    permissions = sm.GetEffectivePermissions(AuthID, rows.Value, page.Value, out TotalEntries);
                }
                catch (Exception e)
                {
 
                }
            }
 
            jqGrid g = new jqGrid();
            g.total = Convert.ToString(Math.Ceiling(TotalEntries / Convert.ToDouble(rows.Value)));
            g.page = Convert.ToString(page.Value);
            g.records = TotalEntries.ToString();
 
            int Counter = 0;
            foreach (ISecurableAuthorization auth in permissions)
            {
                Counter++;
                jqGridRowElement row = new jqGridRowElement();
                row.id = Counter.ToString();
                row.cell.Add(auth.SecurableName);
                row.cell.Add(auth.PermissionName);
                AuthorizationType authType = (AuthorizationType)auth.AuthorizationBits;
                row.cell.Add(authType.ToString());
                row.cell.Add(auth.AuthorizedName);
                row.cell.Add(auth.AuthorizedID.ToString());
 
                g.rows.Add(row);
            }
            return g;
        }