Unfortunately, I have to say yes. You should provide all links to the clues so I know that you've actually found them, because technically you could just find the following clues by accident and not by following the instructions from the previous ones (like it happened to me more than once). It'll only be one point less, though, so really not a big thing :)
Also, you're always welcome to edit your post and add the missing link(s) to it if you like!