Errata "spam"

Dear community,

as the Red Hat Customer Service could not answer my question he redirected me to you. After having bought our subscription and having created a portal login I receive a lot of errata emails for container packages although I have chosen

Notify me when Errata affects systems on my account (recommended)
Receive a notification when a package installed on a system on my organization's account is affected by errata.

on https://www.redhat.com/wapps/ugc/protected/notif.html and I have not yet installed anything. Only container packages notices. I wonder whether I will see updates for real packages I have installed from today (first server ever) but how can I get rid of the container package errata?

Much appreciated if you could help!

Thanks, Jürgen

PS: of course I read https://access.redhat.com/solutions/135503