Hi there @teri
FYI there are different ways you can reply to a comment or post. Look at this screenshot…
If you use the purple reply button at the bottom you are commenting on the topic in general. If you use the reply in grey that is within a comment you will be replying to that comment and member. You can also highlight specific parts of what they say and that will automatically be put as a quote in your comment. If you want to reply to multiple comments in the thread then you can use the purple reply button and then pull quotes from various comments and reply to each one as you go - this is a better option than replying to each one as a separate comment. They system will likely notify you of this and make the suggestion to use quotes - it’s quite helpful like that
Hope that helps.