This, apparently, is why there are so many discrepancies, both large and small, between the various early editions of Chopin's works - Chopin found writing pieces down a tedious affair (he's not the only one, I find it equally so), and never performed them the same way twice - in essence, most of his performances were elaborate improvisations. This, I presume, is why Schumann, dedicatee of Chopin's Ballade No.2, claimed that when Chopin performed the ballade for him the conclusion of the piece was in F major rather than the A minor coda we all know today. (Did Schumann ever dedicate a piece to Chopin? Besides the 'Chopin' vignette from 'Carnaval', I mean. On a related note, I know Liszt dedicated the B minor sonata to Schumann, and Chopin dedicated the Op.10 etudes to Liszt.... did Liszt dedicate any pieces to Chopin, or Schumann to Liszt?)