Haha, well hi there. Those are comments from accounts with very low reputation, which are probably spam. Bots, especially, like to drop a few comments on posts immediately after they get published, and those get downvoted until the poster has such low reputation that their comments don't show up by default anymore.
You can see what the comments are by hitting the "Show" button on the bottom right, and if you see something constructive that you don't think should be spam, go ahead and upvote it, which contributes to its rise from the anonymous depths of spam filtration. :)
Thanks a lot! Now I understand more what all this is haha You've been really helpful, have a nice day! :)