I did a enchantment on my ebony sword that absorbs 150 points off life at first it worked right but after the first few recharges it wasted all its energy in the first hit does anyone know why this happens and I'm level 72 in enchanting and I used a fortify enchantment potion that I created by doing a glitch that I saw in YouTube
This is because you glitch enchanted your weapon.
The amount of charges used up per hit depends on your enchanting skill. At some point it must have recalculated your usage cost so now it drains after 1 hit.
There is an rather convoluted solution to get around this if you are interested: