How to report stolen comments?

On a post I was reading I noticed a comment that was an exact duplicate of another comment on the post. I looked at the user profile and saw that seemed to be the trend for the user - there were only a handful of comments from them, and each one I checked was an exact duplicate of another, earlier comment on its post. I'm thinking this must be a karma-farming bot? When I tried Report User it told me to report the individual comments, so I reported the first one (I chose Spam/Harmful Bot, was that right?), but when I tried to report the second one, the Submit a Report popup wouldn't let me select anything, so I'm stuck. Is there anything I can do to report the rest of the copied comments? Are we blocked from reporting more than one comment from a user?