I take it that these are threads that you replied to at some point.
For posts in country club forums, the default setting is for users to receive replies to posts. In my experience, the setting overrides settings under your account.
To change the setting, find any of your posts in a thread, click on edit the post, click on "Options" tab, and then uncheck "Email me replies to this post." You should be able to just change the options in one of your posts in each thread for it to stop email notifications for that thread.
In future threads you post to in your cc forum, you'll need to remember to uncheck that box.