CiviMail change Mailing Sender Bug, after change always same sender address

I have 2 email adresses in my System. Although I choose the second email address as a sender, the system keeps sending the Test email from the first email address. Even when I deleted the first email account it still keeps sending from the deleted account.

The multiple seetings of From and Sender Addresses in multiple menues is actually confusing. I think I have deleted the settings of the email address I do not want to use, but CiviCrm uses it anyway.