Bug Reports do not get you a quick resolution to your problem. Instead they quietly go to development. If Turbine needs more information you will get a something from them. Otherwise, it seems like you are pitching pebbles into a black hole. Sometime in the future 1-12 months later an update to the game software occurs with a fix. The fix will allow you to get credit the next time you complete the content element.
Note: Helms Deep is due out this fall. We are approaching or have already reached the point where the next game update will be Helms Deep. As far as I know, there is no launch date for this expansion.
Unless stated otherwise, all content in this post is My Personal Opinion.