Oh, you're right. (⊙ˍ⊙)
It was all intentional because it was actually possible to level up a few levels, at least. So "when an enemy dies" for example, also gets triggered when you run into enemies. But progressing with that has, since the last update, accidentally become dependent on whether you get the two-variable value.
And actually, you were only supposed to get gain XP as a non damage option... hmm, I'll take a look.
Thanks for letting me know. (•ω•`)