Can Spell cascade hit same target multiple times?

With spell cascade, there seems to be some overlap in the aoes so that it would be easy to hit normal enemies with 2 of the aoes each cast. And with bosses or other large mobs with big hit boxes, it would probably be easy to hit them with all 3 aoes.

But is it like Shotgunning where the extra circles are only there to increase area coverage, or can all 3 areas count as seperate hit and deal damage to a single target from a single cast?

"shotgunning" is related to projectiles. Area damage can and has always been able to overlap.