Reverie Theme Elements assigned arbitrary CSS tags

I’m setting up a site for a client (a library) using a custom child theme based on Reverie. I am also using Visual Composer, per the client’s request.

I have two templates: Home page and Internal page. The Internal pages have a top navigation bar, the Home page does not. After creating the top navigation bar in the template, assigning a link class “.topnav” and applying it to the Internal pages, I return to the Home page and see that arbitrary links on that page are showing the “.topnav” class attributes. That class is not called anywhere on the Home page. It’s not ever link, just a few here and there.

Chrome and Firefox dev tools verify that “.topnav” isn’t assigned in the HTML, but still lists the correct style attributes as crossed out and “.topnav” as the dominant style attribute.

I’m at a loss as to what’s causing this style to be assigned to random elements. Any insight would be great.