I think since the level 200s all have the same exp, and would (naturally) all share rank 1, they used some sort of hack to give them sequential ranks. For the most part this works (a couple people leveled up together, eg. dolob, and have the same rank - which, unlike normal ranks, shares the lower #)
Now that Cygnus are hitting max level, they share that hack - which means on world ranks, they are sequentially added into the ranking after the 200s. As Adventurers hit 200, they're tossed into the same queue as Cygnus - so a 200 is between the 120s that maxed out before and after him.
But since normal adventurers see Cygnus as having lower level, they're just compared directly and tossed into the same rankings above the Cygnuses, and then given increasing numbers the normal way (ignoring the fact that Cygnus already have the same rankning numbers..
Now that Cygnus are hitting max level, they share that hack - which means on world ranks, they are sequentially added into the ranking after the 200s. As Adventurers hit 200, they're tossed into the same queue as Cygnus - so a 200 is between the 120s that maxed out before and after him.
But since normal adventurers see Cygnus as having lower level, they're just compared directly and tossed into the same rankings above the Cygnuses, and then given increasing numbers the normal way (ignoring the fact that Cygnus already have the same rankning numbers..