How to Collapse All Cards or Expand All Cards?

Hi Ivan - sorry to have left this hanging, but it's bubbled back up in priority for us now. I've done further investigation on this, and it appears to be a consequence of having the CardViewSettings property of ShouldCollapseCards="True". Without this setting everything seems to behave properly, but when it's set, things seem to get out of sync. I have an example project I can send to you if it's helpful, but I've pasted the relevant source below:

MainWindow.xaml

MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Infragistics.Windows.Editors;
using Infragistics.Windows.DataPresenter;

namespace CardViewTest
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            this.InitializeComponent();

            // Insert code required on object creation below this point.
        }

        private void CollapseAllButton_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            DataPresenterBase dataPresenter = this.datacards as DataPresenterBase;
            if (dataPresenter != null)
            {
                foreach (Record currentRecord in dataPresenter.Records)
                {
                    currentRecord.IsContainingCardCollapsed = true;
                }
            }
        }

        private void ExpandAllButton_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            DataPresenterBase dataPresenter = this.datacards as DataPresenterBase;
            if (dataPresenter != null)
            {
                foreach (Record currentRecord in dataPresenter.Records)
                {
                    currentRecord.IsContainingCardCollapsed = false;
                }
            }
        }
    }
}