Updated:
I have two c# libraries (framework 3.5) in plugin folder. (Unity 5.1.2p2)
First library has:
[AddComponentMenu("Game/Core/Components/test1")]
public class Class1 : MonoBehaviour { }
[AddComponentMenu("Game/Core/Components/test2")]
public class Class2 : MonoBehaviour { }
Second library has:
[AddComponentMenu("Game/General/Components/test3")]
public class Class3: MonoBehaviour { }
When i open “add component” menu in Editor, all 3 scripts located in Game/Core/Components. Is this normal behaviour or bug?