It only shows one icon on purpose, so that if someone goes through a post responding to things point-by-point in a single long comment, and then a reader goes through the post expanding the comment each time, they don’t get flooded with duplicate views of the same comment. If you pin a comment, though, it will highlight where all the blockquotes were, including ones further down in the post, so you can track things somewhat that way.
It only shows one icon on purpose, so that if someone goes through a post responding to things point-by-point in a single long comment, and then a reader goes through the post expanding the comment each time, they don’t get flooded with duplicate views of the same comment. If you pin a comment, though, it will highlight where all the blockquotes were, including ones further down in the post, so you can track things somewhat that way.