Having trouble with CombineReports - only getting first and last orders to print

I have a customer who wants to mass print Pick Tickets for sales orders with any status.

I created a custom processing screen to do this.  The screen works perfectly with the exception that I am only getting the first order in the list and the last order in the list.  I selected 8 records to print and verified that all 8 were in the list being processed in debug mode.  I found an article on stackoverflow where someone had a similar issue.  His issue was fixed by adding the MergeLast as false on the last record being added to the report.  I used a counter to find if the item being added was the last one, and put false in for the MergeLast parameter.  Did not help.

Here is my graph:

	public class ICSPrintPickTicketsProcess : PXGraph<ICSPrintPickTicketsProcess>
	{

		public PXFilter<Filter> FilterView;
		public PXCancel<Filter> Cancel;

		public PXFilteredProcessing<SOOrder, Filter,
			Where<SOOrder.orderType, Equal<SOOrderTypeConstants.salesOrder>>,
			OrderBy<Desc<SOOrder.orderNbr>>> DetailsView;

		protected virtual IEnumerable detailsView()
		{
			Filter filter = FilterView.Select();

			DetailsView.Cache.Clear();

			PXSelectBase<SOOrder> query = new PXSelect<SOOrder,
				Where<SOOrder.orderType, Equal<SOOrderTypeConstants.salesOrder>>,
				OrderBy<Desc<SOOrder.orderNbr>>>(this);

			if (filter.OrderStatus == "O")
			{
				query.WhereAnd<Where<SOOrder.status, Equal<SOOrderStatus.open>>>();
			}
			else
			{
				query.WhereAnd<Where<SOOrder.status, Equal<SOOrderStatus.completed>>>();
			}

			if (filter.ShowPreviouslyPrinted == null || filter.ShowPreviouslyPrinted == false)
			{
				query.WhereAnd<Where<AFSOOrderExt.usrPickTicketsPrinted, Equal<False>, Or<AFSOOrderExt.usrPickTicketsPrinted, IsNull>>>();
			}
			else
			{
				query.WhereAnd<Where<AFSOOrderExt.usrPickTicketsPrinted, Equal<True>>>();
			}

			foreach (SOOrder item in query.Select())
			{
				yield return item;
			}
		}

		public ICSPrintPickTicketsProcess()
		{
			DetailsView.SetProcessCaption("Print Selected");

			//DetailsView.SetProcessAllCaption("Print All");
			DetailsView.SetProcessAllVisible(false);

			DetailsView.SetSelected<SOOrder.selected>();

			DetailsView.SetProcessDelegate(
				delegate (List<SOOrder> list)
				{
					DoIt(list);
				});
		}

		public static void DoIt(List<SOOrder> list)
		{
			int counter = 0;
			int countTotal = list.Count;

			var myGraph = PXGraph.CreateInstance<ICSPrintPickTicketsProcess>();

			PXReportRequiredException ex = null;

			foreach (SOOrder salesOrder in list)
			{

				PXProcessing<SOOrder>.SetCurrentItem(salesOrder);

				counter++;

				Dictionary<string, string> dictionary = new Dictionary<string, string>();
				dictionary["OrderType"] = "SO";
				dictionary["OrderNbr"] = salesOrder.OrderNbr;

				if (counter != countTotal)
				{
					ex = PXReportRequiredException.CombineReport(ex, "IC641090", dictionary, true);
				}
				else
				{
					//last one so put false
					ex = PXReportRequiredException.CombineReport(ex, "IC641090", dictionary, false);
				}

				PXProcessing.SetInfo(list.IndexOf(salesOrder), ICSMessages.PTSuccess);

				//This updates the custom field to indicate it was printed
				SOOrder currentOrder = SelectFrom<SOOrder>.Where<SOOrder.orderNbr.IsEqual<@P.AsString>
					.And<SOOrder.orderType.IsEqual<SOOrderTypeConstants.salesOrder>>>.View.Select(myGraph, salesOrder.OrderNbr);
				if (currentOrder != null)
				{
					AFSOOrderExt ext = currentOrder.GetExtension<AFSOOrderExt>();
					if (ext != null)
					{
						ext.UsrPickTicketsPrinted = true;
						myGraph.DetailsView.Update(currentOrder);
					}
				}

				if (counter == countTotal)
				{
					myGraph.DetailsView.Cache.Persist(PXDBOperation.Update);

					ex.Mode = PXBaseRedirectException.WindowMode.New;
					//ex.SeparateWindows = false;
					throw ex;
				}
			}
		}


		[Serializable]
		[PXHidden]
		public class Filter : PXBqlTable, IBqlTable
		{
			#region OrderStatus
			[PXString(1, IsFixed = true)]
			[PXDefault(ICSMessages.Open)]
			[PXUIField(DisplayName = "Order Status", Enabled = true)]
			[PXStringList(
			new string[]
			{
				ICSConstants.Open,
				ICSConstants.Completed
			},
			new string[]
			{
				ICSMessages.Open,
				ICSMessages.Completed
			})]
			public virtual string OrderStatus { get; set; }
			public abstract class orderStatus : PX.Data.BQL.BqlString.Field<orderStatus> { }
			#endregion

			#region ShowPreviouslyPrinted
			[PXBool]
			[PXDefault(false, PersistingCheck = PXPersistingCheck.Nothing)]
			[PXUIField(DisplayName = "Show Previously Printed")]
			public virtual bool? ShowPreviouslyPrinted { get; set; }
			public abstract class showPreviouslyPrinted : PX.Data.BQL.BqlBool.Field<showPreviouslyPrinted> { }
			#endregion





		}

	}

The pertinent code is in the DoIt method.  If you select one record, perfect.  If you select multiple records (Sales Orders), you get 2 pages on the report.  The first order and the last order in the list.

Please help.