Yeah it is only one enchantment. I'm still trying to figure out about permanent enchantments. See through out my journey of cyrodil I have encountered 3 weapons that have have this green marker at the bottom left corner. Now these enchantments are permanent because you never have to recharge them. I don't know how but they are just like this. I will post again with more info on this later. Until then please report if you have seen anything like this.
Murphy's Law: It is impossible to make anything foolproof because fools are so ingenious.