Hi Jason, thank you for you reply.
I changed the Universal Email behavior, and now get a copy of the email.
The other issue did not work out. The universal Email behavior is indeed before the code for the Store Order Summary behavior. And with this code it did work when I started out.
When I change the order of the behaviours, and put the universal Email behavior after the Store Order Summary, neither I nor the customer gets an email. I also tried putting it after the Store Order Detail behaviour, but that didn't work either.