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If you don't mind me asking did you run a complete crawl of the site prior to changing the theme? I only ask because very unlikely that the identical URL structure will remain considering all the different modifications to photographs and pages. if you have the original version you could run a screaming frog test on both the original and new site? https://www.screamingfrog.co.uk/seo-spider/ you could do this by taking your backed up version of your old site and uploading it to pantheon.io that would allow you a free staging server allowing you to not have to worry about duplicate content and perform tests like this. Respectfully, Tom

I agree with Cesare, if your blog has been a big part of your website I wouldn't move it to a subdomain. You'll lose any authority you've built to your website with your blog content.

Thanks!

I thought this question would be very interesting to lots of people.  someone please!

Ah, ok. My mistake, I didn't drill down enough. One thing I did notice: you have authorship markup on those product pages as well. That should be removed. According to Google's guidelines, for product pages that are not specifically written/constructed by an "author," that markup should not be there. Rel="publisher" is the only necessary markup for non-blog or article content. The schema markup you've implemented looks good in the page source, and checks out as being correctly implemented (without any duplicates) using Google's Structured Data Testing Tool (found in Google Webmaster Tools). It appears the data highlighter markup is not causing duplicates. I'd recommend double-checking all the product pages you've added schema to that you originally had from the data highlighter markup. There may be duplicates, there may not. To be honest, I've always gone right to schema.org, but checking for duplicates should be the only thing you should have to worry about. Good luck!

Matt Cutts has a November 2013 video that provides greater clarity. http://www.youtube.com/watch?v=QHG6BkmzDEM#t=58

i was thinking that same thing, so I took out the LED before supplies.  I could probably take out the LED before project and add "lighting" in there! LEDSupply - Best Deals on Cree LEDs, LED Drivers & Supplies For All Your Lighting Project Needs! It's live on the site.  I like it, thanks for the comments, that was helpful!