Grid virtual scrolling not updating count

Hi guys,

I'm having an issue with a server paged data source, where if the length of the result set changes the data source is not updated with the change. For example:

                    $("#grid").kendoGrid({
                        dataSource: {
                            type: "json",
                            serverPaging: true,
                            pageSize: 100,
                            transport: {
                                read: {
                                    url: "/Req/Azure",
                                    dataType: "jsonp",
                                    data: {
                                        sid: sid,
                                        q: query
                                    }
                                }
                            },
                            schema: {
                                data: "data",
                                total: "total"
                            }
                        },
                        height: h,
                        width: "auto",
                        scrollable: {virtual: true},
                        selectable: "row"
                    });

If on the first request of the data source (page=1, skip=0, take=100) the total is 200 and on the second request (page=2, skip=100, take=100) the total is 202, the data source never makes a third request as it has reached the initial 200 records.

Any ideas how i can work around this issue?
Tony