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Confusion around duplicate communities
(lemmy.world)
A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).
If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!
Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy
I'm not really sure how it is with Lemmy but kbin displays the instance URL within the magazine search. Maybe you can check the URL of those communities to see it more clearly, but yes, those should be all from different instances. Whether you want to subscribe to the biggest or all of them is up to you, just like you could have subbed to various kinds of subreddits for the same topic.