Visual Studio 2013 - Class Diagram strangeness - visual-studio-2013

Question

VS2013 Premium update 3. When I right click on a .cs and do View Class Diagram, VS seems to be putting all entities on 1 .cd file. Even though they are in a different Namespace.
Is this standard behaviour, or is something stuffed in this solution?
Relevant section of .csproj
Source https://github.com/djhmateer/AltNetDI
<ItemGroup>
<Compile Include="Example8.cs" />
<Compile Include="Example7.cs" />
<Compile Include="Example6.cs" />
<Compile Include="Example5.cs" />
<Compile Include="Example2.cs" />
<Compile Include="Example6Mike.cs" />
<Compile Include="Example1.cs" />
<Compile Include="Program.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<ItemGroup>
<None Include="App.config" />
<None Include="ClassDiagram1.cd" />
<None Include="packages.config" />
</ItemGroup>
Example1.cs
namespace AltNetDI1 {
class CompositionRoot {
public static void EMain() {
// Instantiating the objects we will need
IReader reader = new TextFileReader();
IWriter writer = new ConsoleWriter();
// Pass objects to our Appliction via Dependency Injection
IApplication application = new Application(reader, writer);
application.Run();
}
}
Example2.cs
namespace AltNetDI2 {
class CompositionRoot {
public static void EMain() {
IReader reader = new TextFileReader();
//IWriter writer = new ConsoleWriter();
// Decorating ConsoleWriter with a WriterLogger
IWriter writer = new WriterLogger(new ConsoleWriter());
// Pass objects to our Appliction via Dependency Injection
IApplication application = new Application(reader, writer);
application.Run();
}
}