You are completely wrong. Here Iam talking about the quality link backs which search engines can recognize. Why search engines are showing internal pages in case of link backs.

Do you consider internal pages as link backs.??

If search engine really giving more important of link backs why cant you show the real link backs of your website. Whats wrong in this??

Remember search engines need guidance from each link to another one. If your are providing through the sitemap then why do you worry about the indexing.??