2(1) together with d3(2) in 
Moving the last quaver in the bottom voice in bar 78 and 82 so that it is between the 2nd and 3rd notes of the triplet was an arbitrary decision by the reviser of GE. The A notation, both in these bars and in two repetitions of this phrase in different keys (bars 165-169 and 245-249) leaves no doubts about the synchronisation of both R.H. voices – their last notes are to be performed together regardless of the rhythmic value in a given voice. We can observe this kind of notation numerous times in other pieces by Chopin, cf., e.g. the Nocturne in C minor, Op. 48 No. 1, bars 61-63, the Ballade in F minor, Op. 52, bars 217-219 or the Prelude in E, Op. 28 No. 9, bar 8.
See also bar 80.
Compare the passage in the sources»
category imprint: Differences between sources
issues: GE revisions
notation: Rhythm