I attempted to fix the problem myself, but I ended up messing up the structure of the breadcrumbs on all the pages (but fixed the problem with the blog posts). I have reverted back to the original class-breadcrumbs.php along with your suggested update from above and now you can see that it isn’t working correctly when viewing a single blog post (still getting the double “News > News”) category within the breadcrumb. But now the pages are working correctly. You can take a look here: http://www.pcomusic.org/video-games-live-at-comic-con/
Okay I tried this and it’s very close, but the structure I’m getting now is:
You are here: Home » News » News » [post title]
With a double “News” within the breadcrumb. Any suggestions?