That is correct yes, there is a separation of users we did about… oh goodness… over a year ago I think.
We know this can be a little confusing for some users and plan to address it probably in Q2/Q3.
End users are those who use the REST and GraphQL APIs and Admin users are those that can login to the admin panel. There is a bit of information in the blog post: Splitting the management of Admin Users and End Users