When you need to change the quantity, you should decide where to make your changes and set the settings accordingly. We suggest the following combination of settings to avoid Nembol and Shopify overwriting each other: Option 1: Make your edits in Nembol: Edit from Shopify OFF Edit from Nembol to Shopify ON Edit from Nembol to Etsy ON Edit from Nembol to eBay ON Option 2: Make your edits in Shopify: Edit from Shopify ON Edit from Nembol to Shopify OFF Edit from Nembol to Etsy ON Edit from Nembol to eBay ON