Shopify Marketplace Connect

I wanted to give this app a great review as I was excited to get my products connected with my Etsy store.
However now that's it's connected and I have spent many hours making sure the titles and products ingredients and categories, tags etc are set up as necessary.
EVERY TIME a product is sold on my shopify store it goes back and overwrites the details I have updated on Etsy. The connection I required was simply to update the quantity.
They should offer this as an option - only update the quantity when checking the shopify site for updates.