CellTemplate or CellEditingTemplate?

[Trump]

I have a column which has read mode or edit mode. Read mode means that column display text in a textblock. Edit mode means that the column display a textbox or combobox so the use can input the value in the control. So I want to customize the datetemplate.

<telerik:GridViewDataColumn DataMemberBinding="{Binding Salary}">
            <telerik:GridViewDataColumn.CellTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Salary}" Visibility="{Binding ReadOrEdit, Convert={StackResources BooleanToOpacityConverter}}" Validation.ErrorTemplate="{StackResources myTemplate}"/>
                        <TextBox Text="{Binding Salary}" Visibility="{Binding ReadOrEdit, Convert={StackResources InvertedBooleanToVisibilityConverter}}" Validation.ErrorTemplate="{StackResources myTemplate}"/>
                    </StackPanel>
                </DataTemplate>
            </telerik:GridViewDataColumn.CellTemplate>
        </telerik:GridViewDataColumn>

The validation template likes

<ControlTemplate x:Key="myTemplate">
    <DockPanel>
        <Border BorderBrush="Red" BorderThickness="1">
            <AdornedElementPlaceholder x:Name="controlWithError"/>
        </Border>
        <TextBlock Foreground="Red" FontSize="20" FontFamily="Segoe UI" Margin="3,0,0,0"  MouseDown="Exclamation_MouseDown"  Tag="{Binding AdornedElement.(Validation.Errors)[0].ErrorContent, ElementName=controlWithError}">!</TextBlock>
    </DockPanel>
</ControlTemplate>

I am not sure it is the right way. Should I put the textbox in CellEditingTemplate because of it is for editing? The reason is when we validate the textbox I found besides the textbox also inside the textbox there was a red border around the text. It means there are two adorners.

Thanks