Links not working – class="current"

For some reason, some certain links are working on one post template, but not on another page. The links look good and the code is essentially identical, the only difference is that on the post, the links have the class “current.”

The social media links in the left sidebar are the culprits. Here’s the link to a page where they work: http://chapelboro.com/author/zachgodwin/

And here’s where they don’t work: http://chapelboro.com/lifestyle/arts-entertainment/dpac-simple-pleasure/

Does anyone know why those links would work on the one page, but not on the posts?