MockMethodCalled fired twice if the method is static

public class MethodContainer
{
    public static NameValueCollection CalledMethod(IDictionary<string, string> stuff)
    {
        return null;
    }

    public void CallingMethod()
    {
        Dictionary<string, string> stuff = new Dictionary<string, string>();
        CalledMethod(stuff);
        if (stuff.Count <= 0)
        {
            throw new InvalidOperationException();
        }
    }
}

[TestClass]
[ClearMocks]
public class UnitTest2
{

    [TestMethod]
    [VerifyMocks]
    public void TestMethod2()
    {
        MockObject<MethodContainer> containerMockObject = MockManager.MockObject<MethodContainer>();
        containerMockObject.Strict = true;
        containerMockObject.StrictStatic = true;
        containerMockObject.CallStatic.MethodSettings("CalledMethod").MockMethodCalled += delegate(object sender, MockMethodCallEventArgs e)
            {
                IDictionary<string, string> stuff = e.SentArguments[0] as IDictionary<string, string>;
                stuff.Add("key1", "value1");
            };
        
        NameValueCollection output = new NameValueCollection();
        MethodContainer container = containerMockObject.Object;

        using (RecordExpectations recorder = RecorderManager.StartRecording())
        {
            container.CallingMethod();
            recorder.CallOriginal();

            recorder.ExpectAndReturn(MethodContainer.CalledMethod(null), output).IgnoreArguments();
        }

        container.CallingMethod();
    }
}