I read about their name change and wondered what it was. I had a similar experience. Really bad UX. When you click join it asks you if you want to create a new server or join an existing server. I picked “join existing” but the first button on the page is to “submit your server”.
UI seems to be a big, general problem for some of the other federated services. kbin’s is atrocious for federation, for example, and we’ve repeatedly observed its users not seemingly knowing where they are just because of how their feed of content is presented to them.