Hello there (first time posting on forum, so if anything isn't ok, please let me kno)
Update #1: Sorry for the poor formatting, I can't seem to insert liquid code correctly...
My main problem is that I want to edit the customer tags via a "subscribe to newsletter" form (form A) AND offer advantages to customers if they enter their email onto form B.
I see a problem (after multiple tests), when the accepts_marketing is set to "true", I can't edit the tags for a customer.
Ex: If I subscribe via the form A (a customer is created), and I want to get the advantages offered via the form B, the 2nd tag won't apply... (If I manually disable the accepts_marketing via the admin for the customer, then it would work... kinda weird!)