The website given by you during IRC isn't official, therefore we cannot use it as a source.
Artist: KITCALIBER
Additional Modding
[INSANE]
00:15:266 (3,4) - this jump is too large which is even tougher than EXTRA, so we found it inappropriate to serve as a difficulty spike. A nerf to reduce its difficulty is highly recommended.
From now on, the mapset is going to be handled by BNs. Should you have any inquires, feel free to poke me or the Team for a helping hand.