On old blog posts and pages, links that point to other blog posts and pages within the site have strikethroughs in them. Links that leave the site do not. Links on portfolio posts do not. Only the links on blog posts and pages that link within the site have strikethroughs, and I can't get rid of the strikethroughs. Also, the links still work. Even if I create new links on the blog or pages, the new links still get the strikethoughs. New links on portfolio posts look normal.
What's happening, and how do I make it stop?