Scrollbar issues

In the following XAML I have two issues, the first is that despite disabling the horizontal scrollbar on the main scrollviewer it still shows, the second is that I have set a style on the textbox (notes) to display a vertical scrollbar but it does not display

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:views="clr-namespace:VTUK.Gemini.Contacts"

mc:Ignorable="d"

d:DesignHeight="1200" d:DesignWidth="1200">

VerticalAlignment="Center"

Margin="0"

Content="{Binding Text, ElementName=URLContainer}"

Grid.Column="2" Grid.Row="15"

Style="{StaticResource HyperlinkStyleButton14}"

Command="{Binding NavigateToUrlCommand}" CommandParameter="{Binding Text, ElementName=URLContainer}"

DataContext="{Binding DataContext, RelativeSource={RelativeSource AncestorType=views:ContactsContent, AncestorLevel=1}}" />

Text="{Binding ContactNotes}"

Style="{DynamicResource CustomTextBoxStyle}" />

ItemsSource="{Binding Contacts}"

CommandButtonsVisibility="Cancel,Commit"

AutoGenerateFields="False"

ValidationSummaryVisibility="Visible"

LabelPosition="Above"

ReadOnlyTemplate="{StaticResource ContactsReadOnlyTemplate}"

VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" />

Command="telerik:RadDataFormCommands.AddNew" CommandTarget="{Binding ElementName=DataForm}">

SnapsToDevicePixels="True" />

Height="16" Width="16"

SnapsToDevicePixels="True" />

IsBusy="{Binding IsBusy}" DisplayAfter="0:0:0.2"

telerik:AnimationManager.IsAnimationEnabled="True"/>

Here is the textblock style