After you found it in the server settings, you need to reset the config to the standard, the button is on the bottom right. Then you need to save, everything will work. And then change the config correctly and there will be no problems, for example, in the Improvements Settings section in Damage you can change Per Level Mult 1 to 10, and then you will have 10 times more for 1 level

Thank i was on a different server setting tab maybe from another mod i download which was acting funny with the mod settings for servers.