Extremely hard and Super hard

In urgent quests, extremely hard the monsters have slightly less stats than in superhard, when it should be far above superhard. Is extremely hard under-tuned, or is superhard over-tuned? Can something be done about this? Arren't higher lvl enemies supposed to have stat increases of a exponential rate?

I tried searching for this in the bug forum, but can't find anything about this here (I do know this is elsewhere, I want to make sure someone at sega see's this).

edit: extremely hard

"Extremely Hard" is the name of the highest difficulty, not "Extra Hard."

https://forum.pso2.com/topic/4526/extremely-hard-boss-hp-lower-than-super-hard

Super Hard is the one setup incorrectly in NA.