Thanks for your response Sarv, fortunately the Shopify support staff have resolved the issue. For the benefit of anyone else who might encounter the same thing, it occurred because I was copying and pasting product description from one product to ano...

Here's an example....  

Hi. As the title says. Yesterday everything was fine, today, on several of my products the variant drop downs appear twice. I just attempted deleting one of the products and recreating it but it's still happening. Any help would be much appreciated a...