First they are customers to be and subscribed to a list through a form. This works: They reveceive the welcome-e-mails according to the rules set. Let’s call this list: intromails.
Then, after they decide to buy something, they are also added to another list (say customers) through the interface with Woocommerce, (this works) and should be getting other welcome e-mails for which i have set the rules. Those e-mails are never sent.