Scheduler Tutorial: Hotel Room Booking. Left Resize doesn't work??? Right Resize works

It looks like there is a bug in the EventResize event handler. If you modify it like this it will work fine:

    protected void DayPilotScheduler1_EventResize(object sender, DayPilot.Web.Ui.Events.EventResizeEventArgs e)
    {
        string id = e.Value;
        DateTime start = e.NewStart;
        DateTime end = e.NewEnd;
        string resource = e.Resource;

        string message = null;

        if (!dbIsFree(id, start, end, resource))
        {
            message = "The reservation cannot overlap with an existing reservation.";
        }
        else if (e.OldEnd <= DateTime.Today)
        {
            message = "This reservation cannot be changed anymore.";
        }
        else if (e.OldStart != e.NewStart)
        {
            if (e.OldStart < DateTime.Today)
            {
               message = "The reservation start cannot be changed anymore.";
            }
            else if (e.NewStart < DateTime.Today)
            {
                message = "The reservation cannot be moved to the past.";
            }
            else
            {
                dbUpdateEvent(id, start, end, resource);
            }
        }
        else
        {
            dbUpdateEvent(id, start, end, resource);
            //message = "Reservation updated.";
        }

        DayPilotScheduler1.DataSource = dbGetEvents(DayPilotScheduler1.StartDate, DayPilotScheduler1.Days);
        DayPilotScheduler1.DataBind();
        DayPilotScheduler1.Update(message);
    }

Note the missing "else { dbUpdateEvent(id, start, end, resource); }" block inside "else if (e.OldStart != e.NewStart)".