Facebook Shop issues

[cinni]

Facebook shop help (shopify integration) : When I created collections in my shop and added the products they showed up fine. When I added new products to my shopify and made them available on my facebook sales channel through shopify, they show up on Facebook, but made duplicate "sets" (are these the same as collections?) and i cant delete them i get an error now when i customize the shop in the live editor, even though the products are in the collection, they dont show up under the published shop. It's showing up blank when i clock on a collection even though the products are in there ... 

WHATS GOING ON?!... how do i delete duplicate collections created also on facebook...??? the facebook info on how to do this does not lead me to it???