When my daughter was about 1.5 she would wave like that, waving so she could see her hand correctly.
Not long after that she'd dismiss people she didn't want to deal with with a little blown kiss and a wave. So at the doctor's office they had two nurses come in to give her some shots and she kept doing the little kiss and wave and they went "aww she's blowing kisses" and my wife said "no she's actually trying to dismiss you"