I'm not too sure if you are asking how to unsubscribe from threads or if you are reporting a bug, but you can check your own subscribed threads here:
You should be able to unsubscribe from threads there.
Also, you may be subscribed to a forum (eg General, Training). You can unsubscribe from any that you are subscribed to in your Preferences:
Lastly, if you wish to keep from subscribing to threads to which you have posted, you can change the "Default Thread Subscription Mode" here:
Hope that answers your question...