I just got an email from JJ and the answer to the question is simply:
There is no way, at least for now …
From JJ: “I wish I could make a note of it and prevent it from happening but currently the policy is to add a scoop to every order. I’m honestly not sure why, but apparently it’s rather difficult to differentiate between orders that need one and orders that don’t. So sorry 
Hopefully we’ll be able to fix this soon.”
Not sure why I have to put that here and not JJ themselves.