The interpretation of the 
hairpin in A, in spite of differing arms, seems quite simple – while writing the top arm, Chopin had to bypass the R.H. chord, hence we assume that it is the bottom arm that determines the intended length of the mark. In GE (→FE,EE) bar 12 opens a new line, which forced the division of the hairpin into two separate marks (it was one of the ways – in addition to the contemporary one – of reproducing hairpins in such situations). IE omitted the first one, probably due to the engraver's inattention.
In EE the cresc. indication in bar 12 was omitted, which could be a simplification of notation or an oversight.
Compare the passage in the sources»
category imprint: Graphic ambiguousness; Differences between sources
issues: EE revisions, Scope of dynamic hairpins, Errors in EE, GE revisions, Inaccuracies in A, Errors in IE
notation: Articulation, Accents, Hairpins, Verbal indications