I have gone into the User Control Panel and turned off alerts. I am still getting them. What more do I need to do?
Maybe you need to unsubscribe from the threads in question. You can use this thread as a test. Did you get an email for it? If so, then you may not have changed your settings correctly. If you are getting emails only for older threads, then those threads are still subscribed. I think there is a way to see all threads that you are subscribed to. Try this one: ucp.php?i=main&mode=subscribed
That did the trick. Thanks.