The issue whether the accidentals to the small notes apply to the normal-sized notes was not clearly stated in Chopin's time, as it turns out. In GE and FE there is no accidental before the bottom note of the L.H. chord on the 3rd beat in b. 62 and 63, d, which, at least theoretically, can be misleading. Naturals were only added in EE – in EE1 in b. 63 and in EE2 in b. 62.
FE2 added a not so justified cautionary 
before d2 in b. 63. The accidental is also present in EE which added yet other cautionary naturals – before d2 in b. 62 and 64 as well as d1 in b. 63-64.
In the main text we include only the naturals before d in b. 62-63.
Naturals in those places were also being added in the analogous b. 295-297.
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category imprint: Differences between sources; Editorial revisions
issues: EE revisions, Inaccuracies in GE, Inaccuracies in FE, FE revisions
notation: Pitch