Hexblast Poe 2 does not working properly (i think)

Hi i have 2 issues with hexblast gem from witch, in the preview of the video shows that blows all the curses of the target, also the description said maximun 9 explotions. The thing is that when im casting it, it blows just 1 of the curses at time. and i apply 3 curses at the moment to a target. i try using curses with blasphemy, without blasphemy, using hexblast with multiple supports and does not work and i want to know if im doing something wrong.

Also you may want to know that i almost kill with hexblast, i dont have an screenshot but i can tell what i did: With blasphemy i curse all the targets arround me, exept the , but when i use hexblast in the targets around the shade and they die from the explotion, it damage the .

Hope that this info helps and sory for not having an screenshot.