Elven Accuracy wording vs maths - sanity check

[MarkB]

With that thought, if you have a situation where Advantage, Disadvantage both exist and Elven Accuracy applies, in what order would you apply the effects? If Advantage and Disadvantage cancel each out is Elven Accuracy just wasted? Or would you let the Elven Accuracy cancel out the Disadvantage and end up giving the character advantage again?

By the rules, any time that there are sources of both advantage and disadvantage on a roll, you apply neither and instead roll normally. In such a case Elven Accuracy would not be triggered.