In FE (→EE) the a1 quaver was doubled, as a result of which the entire group includes 8 notes. In the 1st half of the bar, FE committed two evident mistakes more: the mordent was overlooked as well as the 
raising the second b
1 to b1 (see also notes in the 2nd half of the bar). In FED Chopin corrected two mistakes: he deleted the superfluous a1 and added the missing . The accumulation of mistakes of FE in this bar must be surprising, particularly if we take into account Chopin's proofreading both in FE1 and FE2 (cf. bar 138). It is also puzzling why, in spite of revisions performed in subsequent impressions of EE (even in this bar), no attempt at indicating the actual number of notes in the group was made, not to mention introducing the correct version of GE1, which was taken into consideration already at the time of revising EE2.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Errors in FE
notation: Rhythm