Adding a smart panel to SO301000 to show what other orders a customer has placed, only shows one order in grid.

Hello, I am currently trying to add a smart panel that just shows other orders a customer has placed. I used this vlog as a guide: https://www.acumatica.com/blog/vlog-changing-an-acumatica-po-number-with-a-smart-panel-and-custom-action/

It got me most of the way there. Currently I have the dialog box popping up and I am able to close it. In the code I can see that I am pulling all orders that a customer has made. However, the grid in the dialog box only shows one item in it and I am not exactly sure why that would be. I thought it might be related to this other forum post: 

But since I am seeing something in my grid, I think I am making a different mistake.

namespace PX.Objects.SO {
    // Acuminator disable once PX1016 ExtensionDoesNotDeclareIsActiveMethod extension should be constantly active
    public class SOOrderEntry_Extension : PXGraphExtension<SOOrderEntry>
    {

        public PXFilter<MSCustomerOrderDac> MSCustomerViewForm; //This is used as the key for the dialog box
        public PXFilter<MSCustomerOrderDac> MSCustomerOrderViews; //This is used as teh key for the grid

        public PXAction<SOOrder> ViewCustomerOrders;
        [PXUIField(DisplayName = "View Custoemr", MapEnableRights = PXCacheRights.Select, MapViewRights = PXCacheRights.Select)]
        [PXButton(Category = "Other")]
        [PXUIEnabled(typeof(Where<SOOrder.customerID.IsNotNull>))]
        protected virtual IEnumerable viewCustomerOrders(PXAdapter adapter)
        {
            MSCustomerOrderViews.AllowInsert=true;
            PXSelectBase<SOOrder> orders =
                    new PXSelectReadonly<SOOrder,
                    Where<SOOrder.customerID, Equal<Current<SOOrder.customerID>>>>(Base);


            foreach (SOOrder order in orders.Select())
            {
                MSCustomerOrderDac newOrder = new MSCustomerOrderDac();
                newOrder.OrderNumber = order.OrderNbr;
                newOrder.LineNbr = linenumber++;
                newOrder = MSCustomerOrderViews.Insert(newOrder);

            } //only inserts one thing, no good/


            if (MSCustomerViewForm.AskExt(true) != WebDialogResult.OK) //need this to show the form
            {
            }

            return adapter.Get();
        }

        // I might need to add a 
        [PXVirtual]
        [Serializable]
        [PXHidden]
        public class MSCustomerOrderDac : IBqlTable
        {

            #region OrderNumber 
            [PXString]
            [PXUIField(DisplayName = "Order Number")]
            public virtual String OrderNumber { get; set; }
            public abstract class orderNumber  : PX.Data.BQL.BqlString.Field<orderNumber> { }
            #endregion

            [PXInt(IsKey = true)]
            public virtual Int32? LineNbr { get; set; }
            public abstract class lineNbr : PX.Data.BQL.BqlInt.Field<lineNbr> { }



        }
    }

For the dialog box I haven’t done anything crazy, just defined the keys/skinid/ds/ and created controls for the orderNumber field.

Thanks in advance.