They havent taken effect - I havent done a reload on the server, so easily revertable.@Kainzo - this should be reverted. SilkTouch needs to be a banned enchant as it allows players to gain unplacable blocks, and circumvents Miner's double-drops. Also @Kainzo - you can't enable any of the Damage enchants... They simple break. It looks like you enabled a couple of them.
@Chaz8591 - these enchants will most likely never be in HC, the damage system does not support them (bukkit)
Easy fix would be to allow level 55 to continue to level x amount of xp past 55 xp cap.