In A, there is only one 
mark, at the beginning of the bar. The remaining ones were added in the stage of proofreading FE (→EE) – along with the markings in the next bars – almost certainly by Chopin. One can have doubts whether all the marks entered by the composer were put in the correct place, since Chopin would often put them inaccurately, while the engravers would sometimes combine them with a wrong note. It is particularly the second mark that seems to be placed too far (cf. b. 72, in which the 2nd mark is placed certainly a crotchet too late). Due to the above, according to us, both versions of the editions may be considered equal variants.
In both cases, "harmonic legato" is probably to be applied (holding the chord's elements with fingers): 
.
Compare the passage in the sources »
category imprint: Differences between sources; Editorial revisions
issues: GE revisions, Authentic corrections of FE
notation: Pedalling