According to us, the placement of the 
indication is an example of Chopin using here a convention of writing indications within and not at the beginning of the scope of their validity. Due to the above, in the main text we give preference to the version of GE (→FE1,EE). The version of FESB resulted from the engraver's inaccuracy, and its compliance with A must be accidental, since throughout the entire piece, no features of FESB suggest that this publisher could have had an insight into A.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: GE revisions, Centrally placed marks, Inaccuracies in FESB
notation: Verbal indications