There may be separate legends that are labeled as Atlantis, which could explain the conflicting stories. I tried to find this short video I saw explaining how Atlantis was really just a coastal city on some delta in southwest Spain that made a lot of sense. I watched it embedded, so it's not in my history and I couldn't find it on youtube. It was on some /x/, likely half.
I think the stories of Atlantis being a whole continent are wrong, simply because because of the geography, it would have been pretty noticeable to find a continent under the water. I've read some ideas by others that Atlantis could be the Americas or Antarctica, but not enough evidence holds these up.
I wouldn't be surprised if all those people on youtube claiming to be reincarnated Atlanteans are complete bullshit and they just circlejerk one another.
I think people obsess over it because they hear others talk so highly of it. Then other tales get attached to Atlantis from people tying in other mythologies to it, such as Irish mythology.
I've never been into Atlantis, but I've seen a lot about it over the years. Maybe another anon can explain more.