Scheduled post showing up early on category page

I have a client who has a scheduled post for this coming Tuesday, 9/2.

The post is already showing up on the category page even though it’s not published yet, but if you click on the title you get a 404 error.

The site uses a child of WooThemes’ “Canvas” and I’ve looked at the category.php, but there’s nothing odd about it. Just a standard loop.

Any ideas where to go from here?

Thanks!