Clicking on Posts says 'Page not found'

Using the “blog-in-blog” plug-in so that I can add specific posts/categories into specific pages. My site is https://www.FinancierFrontier.com and I am using Twenty Eleven theme.

The problem is, when going to the “News & Articles” section and clicking on a post,
I get a message saying “Page not found….etc”. This is because when clicking on the post, the link will be something like “https://financierfrontier.com/http:/financierfrontier.com/2012/sample-post”

Why is the main URL appearing twice? I can’t edit the permalink either when I am inserting or editing a post. How can I fix it so that posts can be clicked on?

Thanks.

[No bumping, thank you.]