Vulnerable Damage --> Damage vs Vulnerable

Something most will consider small and insignificant but to an OCD guy like me it’s nerve-racking. Why is the bonus to damage done to vulnerable enemies listed as “Vulnerable Damage” in the UI?
I’m looking at the other damage bonuses and they are pretty logical (e.g. “Damage vs Elites”, “Damage vs Burning”). You have a bonus to a type of damage you do TO an enemy that is susceptible to it, hence “Damage VS (versus) …”.
What is “Vulnerable Damage” though? Is the damage itself weak and vulnerable to our attacks? It doesn’t make sense.
I’d rather it be called “Damage vs Vulnerable” and join its brethren in the proper part of the list of damage bonuses.

The errors with spelling, grammar, tenses, and inconsistencies with terminology are certainly cringe.

(assuming that’s what this is - an error)