To be honest with you, someone showed me the wiki last night after maintenance notes. It probably and most likely is a placeholder and it utilized the level ranges that were stated by the maintenance notes. Certainly monsters will be updated to fit in those categories and when it’s released, it will most likely be checked and adjusted.
Maybe done too soon?
Whatever is on iRO Wiki are boards that were was added before the implementation went on hiatus. With the new updates on the boards, someone on iRO Wiki will have to go through and update with the new changes. The Prontera boards were part of the initial implementation, which is what iRO Wiki has on the site.