It is difficult to assume that Chopin actually wanted to end the slur before the 2nd beat in bar 466. The slur is probably unfinished, perhaps to avoid the crossing with the octave sign. The slur of GE (→FE), led further, was most probably corrected, probably by the very Chopin, which confirms our assumptions that the slur of A is inaccurate. In EE, each of these bars is encompassed with a separate slur, which can be explained by an inaccurate interpretation of FE or a revision, e.g. by analogy to bars 425-426.
Compare the passage in the sources»
category imprint: Differences between sources
issues: EE revisions, Inaccurate slurs in A, Authentic corrections of GE, Corrected slurs of Op. 21 in GE1
notation: Slurs