Actually, it says "Flurry of Blows
Immediately...you can spend 1 ki point to make two unarmed strikes as a bonus action."
Also, per the PHB, "If you take an action that includes more than one weapon attack, you can break up your movement even further by moving between those attacks."
So...
So, basically you are just erasing disadvantage with Elven Accuracy. The middle of 3 dice is the same mean result with a slightly smaller standard deviation.
With that thought, if you have a situation where Advantage, Disadvantage both exist and Elven Accuracy applies, in what order would...
Numerically, it's the same as just having super advantage. It just changes when you get that super advantage.
https://anydice.com/program/12dd3
Turning what an enemy though was disadvantage (avg roll of 7) on you to super advantage (avg roll of 15) is a large effect.