Assigning-OpenQuantity-Changes-Trade-Logic-Resolved

@Glitch - took me a while to nail this one down, but here's a minimal script with the failure (and working) scenario(s).

1. Run with All Data on TQQQ daily bars. The example works for TQQQ only.
2. There are 4 identical exit scenarios that Sell at MarketClose and Sell at Limit. The only difference between them is the assignment of OpenQuantity to Transaction.Quantity. The Limit order should always fill on the Open.
3. Run the Example, click though the Scenarios with the parameter 0 to 3. Scenario 1 is wrong.

CODE:
using System;
using WealthLab.Backtest;
using WealthLab.Core;
using WealthLab.Data;

namespace WealthScript10 
{
    public class ErroneousMOC : UserStrategyBase
    {
      Parameter _scenario; 
      
      public ErroneousMOC()
      {
         _scenario = AddParameter("Scenario", ParameterType.Int32, 0, 0, 1);
      }

      
      // **** EXAMPLE with limit order FOR TQQQ ONLY ****
        public override void Initialize(BarHistory bars)
        {
         PlotStopsAndLimits(3);
        }

        public override void Execute(BarHistory bars, int idx)
        {      
            if (!HasOpenPosition(bars, PositionType.Long))
            {
            if (bars.DateTimes[idx] == _dte)
            {
               _t = PlaceTrade(bars, TransactionType.Buy, OrderType.Market);               
            }
            }
            else
            {
            Position p = LastPosition;
            if (bars.DateTimes[idx] == _dteX)
            {
               if (_scenario.AsInt == 0)
               {
                  // works correctly
                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.MarketClose, 0, "MOC");                  
                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.Limit, 4.10, "LMT");   // Limit triggers at the open
               }
               else if (_scenario.AsInt == 1)
               {
                  // *** PROBLEM SCENARIO - misses the limit and sells at close ***
                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.MarketClose, 0, "MOC-t.Quantity");
                  _t.Quantity = OpenQuantity;
                  
                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.Limit, 4.10, "LMT");   // Limit triggers at the open
                  
               }
               else if (_scenario.AsInt == 2)      
               {
                  // works correctly
                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.MarketClose, 0, "MOC-t.Quantity");
                  _t.Quantity = OpenQuantity;

                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.Limit, 4.10, "LMT");  // Limit triggers at the open
                  _t.Quantity = OpenQuantity;
               }
               else if (_scenario.AsInt == 3)
               {
                  // works correctly
                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.MarketClose, 0, "MOC");                  

                  _t = PlaceTrade(bars, TransactionType.Sell, OrderType.Limit, 4.10, "LMT");  // Limit triggers at the open
                  _t.Quantity = OpenQuantity;
               }
            }
            }
        }
      
      Transaction _t;
      DateTime _dte = new DateTime(2015, 1, 16);
      DateTime _dteX = new DateTime(2015, 1, 22);      
    }
}