Problem with product pages on Artisan theme

Hello!

I have designed several websites for retailers using the Artisan them with no problems. Today I have a new site I have designed and the drop downmenu of the product pages of several products is duplicated, it appears twice on the product page. How do I stop this from happening?

https://www.equineessentialsohio.com/products/kerrits-centerline-quarter-zip?_pos=3&_sid=d1e7b648c&_ss=r

I was under the impression that the new store design experience is only available for the Debut theme?