The Earlybird Cardinal database entry does show "not registered" with AHS. Although, and this is a big although at this point, the entry is showing strangely due to the new updates made to the website last week. There are "bugs" being worked on and the database has some that may not be found right away.
@Calif_Sue
That said, if you scroll down to plant events from members you will see the Jan 1, 2022 comment from Frillylily. You can submit a request to edit the data for a plant by scrolling down on the Earlybird Cardinal database page to "Edit Plant Details", fill in the info and submit your request. I agree, there should be a "also sold as" note in the plant data for both plants.