Why was the double A-flat here?
No change of key, no modulation to a new key, no logical reason…
The music was published in 2011. Could it be a music notation software glitch? Not likely!
Here’s my theory: There is a mad music copyist out there with delusions of taking over the world one enharmonic at a time by sowing discord and confusion. It’s possible that I fell into their evil trap the first time I played this easy piece, thus proving the theory.