Thanks for posting this LPS. I thought that was the way the site operated now. That is quite odd. At first I thought you were mentioning how they change in rating and in relation to their ranking. That will fluctuate by their individual changes and the place that they have, but certainly we should be able to go to some sort of predictable set depth, regardless of who is there and what their rating is.
Random behavior of the leaderboard's "More" control.

well using the member Page, then clicking on highest rated, then working yourself back by pages, instead of the More button, is probably faster anyways.

I understand the desire to have server space, but it isn't as if giving us access to the data that is already there anyway, uses any more space or doesn't cost that much more. It is a disservice to the volunteers who help keep this chess working at it's, when they aren't given access to the information that they need. It is also a bit out of place that a person can't look themselves up on a leaderboard and pick opponents of the same rating, as opposed to team matches, open challenges and tournaments, none of which give a member a say in who they play.
When trying to navigate down the ratings on this page:
https://www.chess.com/leaderboard/daily
eventually the "More v" control disappears, and you get something like this (captured in Opera, basic account):
or this (Safari, diamond account):
So far, the deepest I managed to navigate is this (Safari, diamond account):
which I captured as evidence that the place, where navigation stops, is completely unpredictable.
In the past, I had the leaderboard stop at 350 pr 500 members when the control to load more data has disappeared. Others have reported breakage at 1500, and also as low as 200.