Not Correctly Implementing DisplayMemberPath When Using A Style

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XAML

DataTemplate

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What is my style missing that I am unable to support DisplayMemberPath correctly? My object is showing as just the namespace and not the display value that it binds to. When I comment out my entire style for combobox & comboboxitem the binding works as intended but I lost the visual the app goes for and need my style. So I have isolated it to it being a problem with the style template.

There is another section to the style for ToggleButton but this is not affecting the problem.

<Style TargetType="{x:Type ComboBoxItem}">
                <Setter Property="UIElement.SnapsToDevicePixels" Value="True"/>
                <Setter Property="FrameworkElement.FocusVisualStyle" Value="{x:Null}"/>
                <Setter Property="TextElement.Foreground"  Value="{StaticResource NormalForegroundBrush}"/>
                <Setter Property="FrameworkElement.OverridesDefaultStyle" Value="True"/>
                <Setter Property="Control.Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                            <Border Name="Border" SnapsToDevicePixels="True" Padding="2,2,2,2">
                                <ContentPresenter ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" Content="{TemplateBinding ContentControl.Content}" />
                            </Border>
                            <ControlTemplate.Triggers>
                                <Trigger Property="ComboBoxItem.IsHighlighted" Value="True">
                                    <Setter Property="Panel.Background" TargetName="Border" Value="#FF0BBFAF"/>
                                </Trigger>
                                <Trigger Property="UIElement.IsEnabled" Value="False">
                                    <Setter Property="TextElement.Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>

Not working for the items or the combo box

<Style TargetType="{x:Type ComboBox}">
                <Setter Property="UIElement.SnapsToDevicePixels" Value="True"/>
                <Setter Property="FrameworkElement.OverridesDefaultStyle" Value="True"/>
                <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
                <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
                <Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
                <Setter Property="TextElement.Foreground" Value="{StaticResource NormalForegroundBrush}"/>
                <Setter Property="FrameworkElement.FocusVisualStyle" Value="{x:Null}"/>
                <Setter Property="Control.Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="ComboBox">
                            <Grid>
                                <ToggleButton ClickMode="Press" Name="ToggleButton" IsChecked="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}" Focusable="False" Grid.Column="2" Template="{StaticResource ComboBoxToggleButtonTemplate}"/>
                                <ContentPresenter Margin="3,3,23,3" HorizontalAlignment="Left" Name="ContentSite" VerticalAlignment="Center" ContentTemplate="{TemplateBinding ComboBox.SelectionBoxItemTemplate}" Content="{TemplateBinding ComboBox.SelectionBoxItem}" IsHitTestVisible="False" />
                                <TextBox Margin="3,3,23,3" Visibility="Hidden" HorizontalAlignment="Left" Name="PART_EditableTextBox" removed="Transparent" VerticalAlignment="Center" Style="{x:Null}" IsReadOnly="False" Focusable="True" xml:space="preserve" Template="{StaticResource ComboBoxTextBoxTemplate}"/>
                                <Popup Placement="Bottom" Name="Popup" Focusable="False" AllowsTransparency="True" IsOpen="{TemplateBinding ComboBox.IsDropDownOpen}" PopupAnimation="Fade"> 
                                    <Grid MinWidth="{TemplateBinding FrameworkElement.ActualWidth}" MaxHeight="{TemplateBinding ComboBox.MaxDropDownHeight}" Name="DropDown" SnapsToDevicePixels="True"> 
                                        <Border BorderBrush="{StaticResource NormalBorderBrush}" BorderThickness="1,1,1,1" Name="DropDownBorder" removed="{StaticResource WindowBackgroundBrush}"/> 
                                        <ScrollViewer Margin="4,6,4,6" SnapsToDevicePixels="True">
                                            <ItemsPresenter KeyboardNavigation.DirectionalNavigation="Contained" />
                                        </ScrollViewer>
                                  </Grid>
                                </Popup>
                              </Grid>
                            <ControlTemplate.Triggers>
                                <Trigger Property="ItemsControl.HasItems" Value="False">
                                    <Setter Property="FrameworkElement.MinHeight" TargetName="DropDownBorder" Value="95"/>
                                </Trigger>
                                <Trigger Property="UIElement.IsEnabled" Value="False">
                                    <Setter Property="TextElement.Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                                </Trigger>
                                <Trigger Property="ItemsControl.IsGrouping" Value="True">
                                    <Setter Property="ScrollViewer.CanContentScroll" Value="False"/>
                                </Trigger>
                                <Trigger Property="Window.AllowsTransparency" SourceName="Popup" Value="True">
                                    <Setter Property="Border.CornerRadius" TargetName="DropDownBorder" Value="4"/>
                                    <Setter Property="FrameworkElement.Margin" TargetName="DropDownBorder" Value="0,2,0,0"/>
                                </Trigger>
                                <Trigger Property="ComboBox.IsEditable" Value="True">
                                    <Setter Property="KeyboardNavigation.IsTabStop" Value="False"/>
                                    <Setter Property="UIElement.Visibility" TargetName="PART_EditableTextBox" Value="Visible"/>
                                    <Setter Property="UIElement.Visibility" TargetName="ContentSite" Value="Hidden"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>

Thank you for your help!