>Thanks for responding. I was able to remove messages using the "Remove messages" button. However, I noticed that when I got a reply to one of my previous questions, I did a map, and saw several levels of replies which I thought I deleted (removed).

This is not related. What you say when clicking the map is the map of the entire thread. In this map of the thread, there might be some messages related to you but this has nothing to do with your replies.