That's actually quite normal, and you can see the blocked directories in the robots.txt files http://onecoolsitebloggingtips.com/robots.txt and http://thistimethisspace.com/robots.txt
All pages below the directories are blocked, but they're all pages that you don't want indexed anyway.
User-agent: *
Disallow: /next/
Keeps search engines from indexing each Next page on your blog. It's better for the search engines to index the individual posts, not Page 1 of posts, Page 2 of posts, and so on. Also, it prevents duplicate content.
User-agent: *
Disallow: /activate/
Prevents search engines from indexing your blog's activation URL. Who knows how they would get it, but regardless they shouldn't index it.
User-agent: *
Disallow: /wp-login.php
Prevents search engines from indexing your login form.
User-agent: *
Disallow: /signup/
Prevents search engines from indexing signup forms. Again, who knows how they would get it, but regardless they shouldn't index it.
User-agent: *
Disallow: /related-tags.php
Prevents search engines from indexing what is essentially a gigantic pile of words when not parsed correctly.
User-agent: *
Disallow: /cgi-bin/
Prevents search engines from indexing any operational CGI scripts.
User-agent: *
Disallow: /wp-admin/
Disallow: /wp-includes/
Prevents search engines from indexing your admin directory and WordPress resource files.
So, in summary, there are a lot of pages blocked by blocking those directories, but you don't want any of those pages on Google.
