.Grid(Model)
    .ID("igGrid")
    .Width("100%")
    .Height("600px")
    .AutoGenerateColumns(false)
    .PrimaryKey("CompositeID")
    .UpdateUrl(Url.Action("SaveData"))
    .Columns(column =>
    {
        column.For(x => x.CompositeID).HeaderText("CompositeID").Hidden(true);
        column.MultiColumnHeader().HeaderText("Product").Group(sub =>
        {
            sub.For(x => x.Name).HeaderText("Name");
            sub.For(x => x.Barcode).HeaderText("Barcode").FormatterFunction("barCode");
            sub.For(x => x.BarcodeType).HeaderText("Type").FormatterFunction("barCodeType");
        });
    })
    .Features(f =>
    {
        f.Filtering()
            .Mode(FilterMode.Simple);
        f.Sorting()
            .Mode(SortingMode.Single);
        f.MultiColumnHeaders();
        f.Updating()
              .ColumnSettings(cs =>
              {
                  cs.ColumnSetting().ColumnKey("CompositeID").ReadOnly(true);
                  cs.ColumnSetting().ColumnKey("Name").EditorType(ColumnEditorType.Text);
                  cs.ColumnSetting().ColumnKey("Barcode").EditorType(ColumnEditorType.Text).Required(true);
                  cs.ColumnSetting().ColumnKey("BarcodeType").EditorType(ColumnEditorType.Combo).ComboEditorOptions(co =>
                  {
                      co.DataSource(ViewBag.BarCodes)
                          .Mode(ComboMode.DropDown)
                          .EnableClearButton(false)
                          .DataBind();
                  });

              })
      .EnableAddRow(true)
      .EnableDeleteRow(true)
      .EditMode(GridEditMode.Row);
    })
    .DataSourceUrl(Url.Action("GetBarCodes"))
    .DataBind()
    .Render())

Does anyone have any suggestions as to why the combo is not rendering in the proper location?

Thanks,