OMG I totally feel your pain. I've been trying to figure this out for a couple of days now and it seems I am going around in circles doing the same thing over and over. Have you figured out why it shows "set up facebook" and not allow us to enter in the FB pixel ID?
No worries!! Thanks for getting back to me so quickly. I was able to connect with a Shopify expert late last night. My problem now is removing the previous pixels and starting HB fresh. Apparently I had created two but felt like I kept going in circles for days.