There are certain weird configurations that we do not officially support, and this is one of them. When managing your server through our control panel, go to the Expert Settings tab and click to edit Game.ini. You'll need to write in the LevelExperienceRampOverrides and OverridePlayerLevelEngramPoints settings. To learn how to do this, you'll need to read the official documentation here: http://ark.gamepedia.com/Server_Configuration#Game.ini

Be warned that this is fairly complicated editing, and it's easy to screw up your server if you do it wrong.