Hi sm3uma,
Good question! The breadcrumbs were already introduced in 2.5.2, but now I’ve added an option for it as well.
They do not conflict, and you can confirm this using Google’s Structured Data Testing Tool.
You can read all about the Breadcrumbs right here.
I see they’ve just updated their whole Structured Data website… which is unfortunate as I’ve spent a good time last weekend linking everything within the plugin :’).
And here’s an official Google Webmasters video on YouTube about multiple breadcrumbs.
Matt Cutts explains there that they take the first breadcrumb found (“current behavior”), and they use other breadcrumbs found to better understand the overal structure of the website.
This essentially means that The SEO Framework’s (first, and longest) breadcrumb will be used for Google, and the visual one by Breadcrumb NavXT will be used by visitors and a little less by Google.
I hope this clears things up! Let me know if you have any more questions! 🙂
