ChartModifer in Style

Hello,
I just want to override the ChartModifier property in the style

I have tree charts one after the other and only the last chart has a legend. It seems I cannot use a style with the same key multiple times.

<Style x:Key="ChartWithMyModifiers" TargetType="{x:Type s:SciChartSurface}">
    <Setter Property="ChartModifier">
        <Setter.Value>
            <s:ModifierGroup>
                <s:ZoomPanModifier ExecuteOn="MouseRightButton" ClipModeX="None" />
                <s:YAxisDragModifier DragMode="Scale"/>
                <s:XAxisDragModifier DragMode="Scale"/>
                <s:MouseWheelZoomModifier/>
                <s:ZoomExtentsModifier ExecuteOn="MouseDoubleClick" />
                <s:LegendModifier ShowLegend="True"/>
            </s:ModifierGroup>
        </Setter.Value>
    </Setter>
</Style>

The result screen is attached.
Thanks, Gabor