Monster World IV PS2: incorrect game name

Hi,
this link refers to the game Monster World IV on PS2, but the name is incorrect.
https://www.pricecharting.com/game/jp-playstation-2/monster-world-iv

The real name is Monster World Complete Collection [sega ages 2500, vol 29].
it's Monster World IV on the cover, but there are 6 games:
Wonder Boy, Wonder Boy in Monster Land, Monster Lair, Monster World II,
Monster World III and Monster World IV