My homepage is ranking great but my blog posts have dissappeared

[Insppaint]

It all happened a few weeks after Penguin 2.0 was released so I'm not sure if it is in any way related. My home page robt.info currently ranks really well for relevant key words like kids author. This has lead me to believe that 2.0 didn't negatively effect my site. I'm not in the business of anything remotely black hat related and purely focus on content.

But, if you search for individual blog posts (which are extremely unique), they are nowhere to be seen.

For example, one post I did was a story titled 'Fairy Floss For Brains'.

Up until the second week of June I ranked extremely well for these really weird and unique blog posts. But now, they don't rank very well at all. Not even in top 100.

They are indexed and in my sitemap.

Can anyone please help me resolve this issue? Is there something I have done wrong that anyone can see?

EDIT: I was able to utilise feedback from my question to resolve my issue. THANK YOU SO MUCH FOR YOUR HELP GUYS!

[Insppaint]

Thank you for taking the time!

There is a robots.txt (Just updated it then :)) and I am on Yoast...

I just noticed many of the pages fall away from the front page. That was my main concern. Fingers crossed they will crawl back up.

RT

[MoosaHemani]

Checked in your link profile and it seems fine to me! The arrangement of anchor text on links is natural and links are coming from almost all natural ways... didn’t really found any obvious paid or any other low quality tactics to grab links!

There is no roobts.txt file available try to add that plus check what SEO plugin are you using... low quality plug-ins can also cause this problem! I would recommend you to please update your SEO Plugin to Yoast!

Also I have searched few more keywords for different posts and they seems to rank on the first page below the fold so i think you should also focuses on some quality link building in order to get bran first page rankings above the fold.

[Insppaint]

Thank you so much for this..I believe it is currently at 0 because google has only made one update since I started the site in Feb 2013. It's currently at a 4 according to opensite explorer...

Just changed the robots.txt thanks for the heads up. didn't notice that

Maybe these changes will make a diff... fingers crossed. Any other suggestions?

[yeagerd]

I spent a few moments looking at the site and source.  I am not sure yet why you have gone to PR0 for all of your blog pages.

A few things that I saw while checking things out (some of it is probably opinion over fact as I am not sure the overall effects)

Your robots.txt is setup to have all of your WP-Admin and WP-Includes indexed in Google.  I would set both of these folders to not be included.  (You may already have it done in metas etc. but I would put this in my robots.txt

Your robots.txt also needs to declare http://robt.info/sitemap.xml as your sitemap.  It is currently pointing to an attracta sitemap that points to another attracta sitemap and then declares your website to have 9 pages in total.  I am sure you have your sitemap submitted with Google but it is still  a much better practice to have the sitemap link in robots.txt point at your actual sitemap.

You may know something I do not but in your meta tag I do not think you need the /posts/ after your publisher google+ meta link.  This link does not actually appear on the site and used only by the search engine to identify the link between your other online works, Google+ and your site.

I saw these things and thought I would mention them.  I do not think they are the cause of your issues however.  Do you have a Google Analytics and Webmasters account setup?  Do they offer any insight as to why you went to PR0 and it seems like Google may not have very many links for your site.  This may just be the datacenter I was looking at though.

I will follow this post and try to be of more help.  To be honest I now, like you, want to know why.