options.sort not being populated on the third cycle of sorting

[Jeff]

When the grid is populated, the default sorting is taken from:
    serverPaging: true,
    serverSorting: true,
    sort: { field: "Name", dir: "asc" },
    serverFiltering: true,
    pageSize: 10
When I click the Name column header, the grid sorts in desc order as expected.
When I click for a second time, the options.sort array is not populated.
When I click for a third time, the grid sort in asc order.
It seems that for every second click the options.sort array is not being poulated.
Can this be resolved.

This is the code that I am using:

var investorDataSource = new kendo.data.DataSource({
                type: "json",
                transport: {
                    read: {
                        url: "http://localhost//XXXX?Name=^" + $("#searchfor").val(), 
                        dataType: "json"

                    },
                    parameterMap: function (options) {
                        return {
                            pageindex: options.page,
                            pagesize: options.take,
                            //orderby:options.sort[0].field
                            orderby: convertSort(options.sort)
                        }
                    }
                },
                schema: {
                    data: function (result) {
                        return result.Items || result;
                    },
                    total: function (result) {
                        //Note: this is != to the total no of records, but should work
                        return (result.PageSize * result.PageCount) || result.length || 0;
                    }
                },

                serverPaging: true,
                serverSorting: true,
                sort: { field: "Name", dir: "asc" },
                serverFiltering: true,
                pageSize: 10
            });

[Jeff]

Ignore this post.  Those wiser than me in the workings of Telerik controls say that this behaviour is by design.