Nested Linked DockSites are on way

I am unable to drag a Docked Outer ToolWindow into the Inner Docksite but I can drag the Inner DockSite out into the Outer DockSite but once it is docked outside of it can't dock back within.

Seems like it maybe a similar issue to this;

http://www.actiprosoftware.com/community/thread/21049/linked-nested-docksites#103785

Using the "SampleApplication-CShartp" I was able to replicate my issue within the ProductSamples > DockingSamples > QuickStart > NestedDockSites > MainControl.xaml

I simply edited the following two files

MainControl.xaml.cs :- Simply Link the DockSites

/// <summary>
/// Initializes an instance of the <c>MainControl</c> class.
/// </summary>
public MainControl() 
{
    InitializeComponent();
    this.OuterDockSite.LinkDockSite(this.InnerDockSite);
}

MainControl.xaml :- Removed a Inner DockSite 2 to make it a little less busy

    <!-- Outer DockSite -->
    <docking:DockSite x:Name="OuterDockSite">
        <docking:SplitContainer>
            <docking:Workspace>
                <docking:TabbedMdiHost>
                    <docking:TabbedMdiContainer>

                        <docking:DocumentWindow Title="Document(Houses InnerDockSite)">
                            <!-- Inner DockSite -->
                            <docking:DockSite x:Name="InnerDockSite">
                                <docking:ToolWindowContainer>
                                    <docking:ToolWindow x:Name="InnerToolWindow1" Title="Inner DockSite 1-1">
                                        <TextBox BorderThickness="0" AcceptsReturn="True" />
                                    </docking:ToolWindow>
                                    <docking:ToolWindow x:Name="InnerToolWindow2" Title="Inner DockSite 1-2">
                                        <TextBox BorderThickness="0" AcceptsReturn="True" />
                                    </docking:ToolWindow>
                                </docking:ToolWindowContainer>
                            </docking:DockSite>
                        </docking:DocumentWindow>

                    </docking:TabbedMdiContainer>
                </docking:TabbedMdiHost>
            </docking:Workspace>

            <docking:ToolWindowContainer>
                <docking:ToolWindow x:Name="OuterToolWindow1" Title="Outer DockSite 1">
                    <TextBox BorderThickness="0" AcceptsReturn="True" />
                </docking:ToolWindow>
                <docking:ToolWindow x:Name="OuterToolWindow2" Title="Outer DockSite 2">
                    <TextBox BorderThickness="0" AcceptsReturn="True" />
                </docking:ToolWindow>
            </docking:ToolWindowContainer>
        </docking:SplitContainer>
    </docking:DockSite>

Reproduction steps (after changing the demo).

1. Drag Inner "DockSite 1-1" out of the Documents (make sure to take just 1-1).
2. Dock Inside "Outer DockSite 1"
3. Drag Inner "DockSite 1-1" or any of the others and try and dock inside Inner DockSite 1-2 like "Inner DockSite 1-1" was orignally.

Update

I was having a little play today programatically moving the ToolWindows and I can see from Snoop that they are there before I move them but after they simply disapear.

        private void Button_Click_1(object sender, System.Windows.RoutedEventArgs e)
        {
            this.InnerToolWindow1.MoveToLinkedDockSite(this.OuterDockSite);
            this.OuterToolWindow1.MoveToLinkedDockSite(this.InnerDockSite);
        }