Movie Maker – drag and drop narration doesn’t work

When I record and save a narration, it goes as a brown clip to the MM's editor frame. However, if I drag-and-drop the same audio file from a folder to the editor, it shows as a green music clip, not a brown narration clip. So, if I wish to have simultaneously both music and narration, this doesn't work (as you're not able to have two simultaneous music clips). Is there any chances either to change music clip's status to narration or influence to the drag-and-drop method so that the clip