Maybe blame Durand?
I see you belong to the 'don't shoot the pianist' school of criticism.

Indeed I'd love to be able to blame someone else because it's despite everything a really wonderful Gibet. But I don't see any way to blame Durand for him misreading the ostinato from one end of it to the other. Jut conceivably one could blame someone at Decca for the missing half a bar since the bar in question has the same four chords played twice.
Ondine used to have that octave sign missing from the big glissando, didn't it? So there are recordings where a gliss which is supposed to go to the top of the keyboard suddenly drops down the octave...
Never heard anyone actually play that; surely no-one would have thought that was intentional?
I have indeed heard a recording by someone who must have thought exactly that!
Re octave higher/lower signs in Ravel; there's one missing in the Durand 2-piano score of the G major Concerto 1st mt (top system, rh p 22 - surely this should be 8ve lower, as on the previous and next systems?)
Where's that in terms of rehearsal figures? I only have the orchestral score.
Speaking of the score: there's a wonderful moment in the bar before figure 10 where there's a minim written for the
woodblock. And in a context where you wouldn't write a minim unless you really wanted it to sustain - it's a crotchet rest then the minim then another crotchet rest. I've seen percussionists make a great show of doing a vibrato over the woodblock

- but surely it's meant to be one of the other percussion instruments? (Triangle or cymbal perhaps... but which?)