Here’s something to watch out for: when you use multiple shipping profiles, Shopify merges the rates from all of them at checkout. This can result in higher shipping costs for your customers, especially if they’re ordering products from different profiles. By sticking with one profile and our app, you avoid this potential pricing pickle altogether!

Additionally, when this app is asked to calculate shipping rates, Shopify does not specify which Shipping Zone the rates need to be calculated for. Instead, they send the origin (shop location), destination, and cart items. This means that the app needs to find the right Shipping Zone based on the combination of origin and destination (we do not have the data regarding which products are assigned to the Shipping Profile of each zone). If there are more than one zones matching the same origin and destination, then the app can produce shipping rates which were not intended for the given cart items. To avoid this, ensure that shipping rules in the app always use a product filter when one is needed.