Hi LeFxFlo -
The issue is still being worked on, but we should have a way to duplicate matinee actors in a coming update to the engine. Have you tired using the new CameraAnim assets which allow you to save camera motions into the Content Browser as opposed to the level. These are new assets as of 4.2.0 and are still being worked on, but it might be a better way of sharing your camera motion between levels.
Thank You and I will keep you informed as we learn more -
Eric Ketchum