Trying to set the Date Time range slider starting from 1/1/2001 to 12/31/2010. As you can see the year tickMarks start with the correct year but then 2004 is duplicated. I’ve included a screenshot and xaml below.

<ig:XamDateTimeRangeSlider IsSelectionRangeEnabled="True" x:Name="sliderRight" MinValue="1/1/2001" MaxValue="12/31/2010" IsMouseWheelEnabled="True" d:LayoutOverrides="Height" Margin="20,7,20,0" Foreground="#FF373737" FontSize="8" VerticalAlignment="Top" IncreaseButtonVisibility="Collapsed" DecreaseButtonVisibility="Collapsed" LargeChangeType="Years" LargeChange="1" Height="36" SmallChangeType="Months" Grid.ColumnSpan="2">
   <ig:XamDateTimeRangeSlider.TickMarks>
                <ig:DateTimeSliderTickMarks FrequencyType="Years" IncludeSliderEnds="True" >
                    <ig:DateTimeSliderTickMarks.HorizontalTickMarksTemplate>
                        <DataTemplate>
                            <Rectangle Width="1" Height="20" Fill="Black" Margin="0,0,0,14" />
                        </DataTemplate>
                    </ig:DateTimeSliderTickMarks.HorizontalTickMarksTemplate>
                </ig:DateTimeSliderTickMarks>
                <ig:DateTimeSliderTickMarks FrequencyType="Months" IncludeSliderEnds="True" >
     <ig:DateTimeSliderTickMarks.HorizontalTickMarksTemplate>
      <DataTemplate>
       <Rectangle Width="1" Height="10" Fill="Black" Margin="0,0,0,14" />
      </DataTemplate>
     </ig:DateTimeSliderTickMarks.HorizontalTickMarksTemplate>
    </ig:DateTimeSliderTickMarks>
    <ig:DateTimeSliderTickMarks FrequencyType="Years" IncludeSliderEnds="True" NumberOfTickMarks="10" TickMarksFrequency="1">
     <ig:DateTimeSliderTickMarks.HorizontalTickMarksTemplate>
      <DataTemplate>
       <TextBlock Text="{Binding Year}" Margin="0,15,0,0" />
      </DataTemplate>
     </ig:DateTimeSliderTickMarks.HorizontalTickMarksTemplate>
    </ig:DateTimeSliderTickMarks>
   </ig:XamDateTimeRangeSlider.TickMarks>
   <ig:XamSliderDateTimeThumb Name="lowDateThumb" Value="1/1/2010" ToolTipVisibility="Visible" TrackFillBrush="Transparent" InteractionMode="Lock" ValueChanged="RangeChanged" />
   <ig:XamSliderDateTimeThumb Name="highDateThumb" Value="12/31/2010" ToolTipVisibility="Visible" TrackFillBrush="#FF1717A3" InteractionMode="Lock" ValueChanged="RangeChanged" />
  </ig:XamDateTimeRangeSlider>