How does the 'Best Selling' sort option work in collections?

Hey, @randipants .

Welcome to this thread!

If you’ve just changed the sorting order in the Shopify admin, then it could take a moment for the changes to be reflected on the storefront. Can you confirm whether this issue is still persisting on your end?

If the sorting order isn’t reflecting on the storefront, then there could be an issue with the cache or your theme. However, while we’re unable to provide account-specific support via the Shopify Community, we’d be happy to further assist you through live chat and take a closer look at your theme. Please visit the Shopify Help Center and login to your account to create a support request.

If you have any other questions on this topic, don’t hesitate to let me know!