claim the server a day ago and it does not appear the top and I do not understand the clan system , if show me a guide please I can not find anything with the search.

Historical player data will not save because Rust servers do not report players. That's why it says "Player reporting not supported by this game."

Teams / clans are just custom pages you can create, which have news posts, links, descriptions, forums, etc and can be linked to your server page.