can a spell give more than one buff?

Alright, I have a spell, flame stomp.
It is supposed to give the affected units 2 buffs, Flame Stomp and Slowed (custom). However, when tested, the units only had Flame Stomp. Is there a way to make it have both (dummy casters i know, but is there a non-trigger way?)? And also, how do you specify what buffs affect who? (Like the caster, the enemies, etc.)

i dont know about giving multiple buffs (but i dont think it can be done without triggeres) but i do know that you cant make it so each individual buff targets a different unit unless you had 2 or more different abilities casting using dummies (which would require triggers).

Well I meant more like, "This buff goes onto enemies, this one onto the caster" or something like that.