When writing A, Chopin overlooked the fact that in the passage ending the run a 
is necessary not only before the last note but also four notes earlier in order to lower c3 to c flat3 (or only before that earlier note, depending on the adopted principle for accidentals before notes with an octave sign). The error was corrected in GE (→FE) by moving the before the fifth note counting from the end of the bar. In EE this corrected notation was supplemented by again adding the sign before the last note.
Compare the passage in the sources»
category imprint: Differences between sources
issues: EE revisions, Accidentals in different octaves, GE revisions
notation: Pitch