i was not able to reproduce this problem using this code on a new form:

        private void Form1_Load(object sender, EventArgs e)
        {
            UltraChart ultraChart1 = new UltraChart();
            ultraChart1.Dock = DockStyle.Fill;
            this.Controls.Add(ultraChart1);

            ultraChart1.ChartType = ChartType.StackAreaChart;
            DataTable table = new DataTable();
            table.Columns.Add("one", typeof(double));
            table.Columns.Add("two", typeof(double));
            for (int r = 0; r < 100; r++)
            {
                table.Rows.Add(new object[] { r, r });
            }
            ultraChart1.Data.DataSource = table;
            ultraChart1.Data.SwapRowsAndColumns = true;
            ultraChart1.Data.DataBind();
        }

can you advise me on how to reproduce the problem you described?

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