Marking topics resolved placement?

Hello,
One thing I have noticed is when on another person's topic, I see a mark as resolved check box, but know link in the sidebar. When on a topic I started, I see the mark as resolved button in the sidebar and check box. Is this by design or is this an error?

EDIT: There is a mark as resolved button on the sidebar in the features and feedback forum for the original poster, is this supposed to be there? It looks out of place.
Thanks.