Thanks for the sample. I simply had to take the time to fully understand how things work. I did this by creating a sample including data generation. For anyone else facing this issue, here is a complete code listing (copy and run and it should work as is):

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Infragistics.UltraChart.Core;
using Infragistics.UltraChart.Core.Primitives;
using Infragistics.UltraChart.Shared.Events;
using Infragistics.UltraChart.Shared.Styles;
using Infragistics.Win.UltraWinChart;
 
namespace TestCharting
{
    public partial class Form1 : Form
    {
        private DataTable dt;
 
        public Form1()
        {
            InitializeComponent();
 
            dt = CreateData();
 
 
            uChart.ChartType = ChartType.LineChart;
            uChart.BackColor = Color.White;
            uChart.Dock = DockStyle.Fill;
            DataView dv = dt.DefaultView;
            DataTable newDt = dv.ToTable(false, "week", "before", "after");
            uChart.DataSource = newDt;
            uChart.DataBind();
            uChart.Data.SwapRowsAndColumns = true;
 
            Color[] chartColors = new Color[] { Color.Red, Color.Blue };
            uChart.ColorModel.ModelStyle = ColorModels.CustomLinear;
            uChart.ColorModel.CustomPalette = chartColors;
            uChart.Axis.Y.Labels.SeriesLabels.FormatString = "Dollars";
            uChart.Axis.Y.Labels.ItemFormatString = "<DATA_VALUE:#>";
            uChart.Legend.Visible = true;
            uChart.Legend.SpanPercentage = 10;
            uChart.Legend.Margins.Bottom = 300;
            uChart.Legend.Location = LegendLocation.Right;
            uChart.Axis.X.RangeMax = uChart.Axis.Y.RangeMax;
            uChart.Axis.X.RangeMin = uChart.Axis.Y.RangeMin;
            uChart.Axis.X.TickmarkStyle = AxisTickStyle.Smart;
            uChart.Axis.X.TickmarkIntervalType = AxisIntervalType.Weeks;
            uChart.Axis.X.Labels.Layout.Behavior = AxisLabelLayoutBehaviors.Auto;
            uChart.Axis.Y.Extent = 30;
            uChart.LineChart.TreatDateTimeAsString = true;
            uChart.FillSceneGraph += new Infragistics.UltraChart.Shared.Events.FillSceneGraphEventHandler(uChart_FillSceneGraph);
        }
 
 
        void uChart_FillSceneGraph(object sender, Infragistics.UltraChart.Shared.Events.FillSceneGraphEventArgs e)
        {
            IAdvanceAxis xAxis = e.Grid["X"] as IAdvanceAxis;
            IAdvanceAxis yAxis = e.Grid["Y"] as IAdvanceAxis;
 
            //Chart axis starts in upper left at 0,0. 
 
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                DataRow dr = dt.Rows[i];
                AddYearLines(e, dr,i,xAxis,yAxis);
                AddPlannerCodeLines(e, i, dr, xAxis, yAxis);
            }
        }
 
        private void AddPlannerCodeLines(FillSceneGraphEventArgs e, int i, DataRow dr, IAdvanceAxis xAxis, IAdvanceAxis yAxis)
        {
 
            LabelStyle labelStyle = new LabelStyle();
            labelStyle.Orientation = TextOrientation.VerticalLeftFacing;
            labelStyle.HorizontalAlign = StringAlignment.Near;
            labelStyle.VerticalAlign = StringAlignment.Near;
            labelStyle.FontColor = Color.Black;
 
            string[] codes = new string[]
                                 {
                                     dr["disco"].ToString(),
                                     dr["replace"].ToString(),
                                     dr["life"].ToString()
                                 };
            for (int j = 0; j < codes.Length; j++)
            {
                int x = (int)xAxis.Map(i);
                int y = (int)yAxis.Map((int) dr["after"]); 
                Point p = new Point(x, y);
                Point p2 = new Point(x + 5, y - 5);
                Ellipse xb = new Ellipse(p, 10);
                Text xt = null;
                switch (codes[j])
                {
                    case "12":
                        xt = new Text(p2, "L1", labelStyle);
                        xb.PE.Fill = Color.PaleGoldenrod;
                        break;
                    case "14":
                        xt = new Text(p2, "D1", labelStyle);
                        xb.PE.Fill = Color.DimGray;
                        break;
                    case "95":
                        xt = new Text(p2, "R1", labelStyle);
                        xb.PE.Fill = Color.Orange;
                        break;
                    case "96":
                        xt = new Text(p2, "R2", labelStyle);
                        xb.PE.Fill = Color.OrangeRed;
                        break;
                }
                if (xt != null)
                {
                    e.SceneGraph.Add(xb);
                    e.SceneGraph.Add(xt);
                }
            }
        }
 
        private void AddYearLines(FillSceneGraphEventArgs e, DataRow dr, int i, IAdvanceAxis xAxis, IAdvanceAxis yAxis)
        {
            DateTime week = (DateTime)dr["week"];
            int weekNo = GetWeekNumber(week);
            if (weekNo == 1)
            {
 
                int xNow = (int)xAxis.Map(i);
                int yMin = (int)yAxis.MapMinimum;
                int yMax = (int)yAxis.MapMaximum;
 
                Point bottom = new Point(xNow, yMin);
                Point top = new Point(xNow, yMax);
                Line myLine = new Line(bottom, top);
                myLine.PE.StrokeWidth = 3;
                myLine.lineStyle = new LineStyle(LineCapStyle.ArrowAnchor, LineCapStyle.Flat, LineDrawStyle.Solid);
 
                Point top2 = new Point(xNow - 20, yMax);
                Point top3 = new Point(xNow + 5, yMax);
 
                Box b = new Box(top2, 40, 15);
                b.RotationAngle = -90;
                b.PE.Fill = Color.Yellow;
 
                LabelStyle labelStyle = new LabelStyle();
                labelStyle.Orientation = TextOrientation.VerticalLeftFacing;
                labelStyle.HorizontalAlign = StringAlignment.Near;
                labelStyle.VerticalAlign = StringAlignment.Near;
                labelStyle.FontColor = Color.Black;
 
                Text t = new Text(top3, week.Year.ToString(), labelStyle);
 
                e.SceneGraph.Add(myLine);
                e.SceneGraph.Add(b);
                e.SceneGraph.Add(t);
            }
        }
 
        public static int GetWeekNumber(DateTime dt)
        {
            System.Globalization.CultureInfo ci = System.Globalization.CultureInfo.CreateSpecificCulture("no");
            System.Globalization.Calendar cal = ci.Calendar;
            int weekNo = cal.GetWeekOfYear(dt, ci.DateTimeFormat.CalendarWeekRule, ci.DateTimeFormat.FirstDayOfWeek);
            return weekNo;
        }
 
        private DataTable CreateData()
        {
            DataTable dt = new DataTable("SAMPLE");
            dt.Columns.Add("disco", typeof(string));
            dt.Columns.Add("life", typeof(string));
            dt.Columns.Add("replace", typeof(string));
            dt.Columns.Add("week", typeof(DateTime));
            dt.Columns.Add("before", typeof(int));
            dt.Columns.Add("after", typeof(int));
 
            DateTime start = new DateTime(2008, 06, 01);
            Random r = new Random();
 
 
            for (int i = 1; i < 50; i++)
            {
                string disco = "0";
                string replace = "0";
                string life = "0";
 
                if (i % 15 == 0)
                    disco = "14";
                if (i % 12 == 0)
                    life = "12";
                if (i % 25 == 0)
                    replace = "95";
                if (i % 27 == 0)
                    replace = "96";
                DataRow dr = dt.Rows.Add(disco, life, replace, start.AddDays(i * 7), r.Next(100, 1000), r.Next(100, 1000));
            }
            return dt;
        }
    }
}