From the ticket, I see that the email notifications are triggered from a different support address (say A) even though they were initially addressed to another support address (say B). This is because the forwarding address provided in the mailbox of email address B is a default one and not the one generated with respect to the actual support address (the one available under "Forward your email to"). Since the forwarding address is provided incorrectly, the email notifications are getting triggered from your primary support address.
Please refer to this link to check the email forwarding set up in your mailbox.
If you need assistance with the setup, please feel free to write firstname.lastname@example.org. Our support agents would be glad to assist you further.