The difference in the position of 
could result from the Chopinesque manner of writing markings between the upbeat and the 1st note in the bar (Chopin would write separate bar lines on each stave, hence he had space between the staves there). Examples of such markings, written down ambiguously, are quite numerous, cf., e.g. the Concerto in E minor, Op. 11, mov. I, bar 1 or 16 or the Prelude in B
minor, Op. 28 No. 16, bars 45-46. Fontana, whose marks of this kind were generally smaller than those Chopin wrote in his autographs, managed to write at the end of bar 8; however, the engraver of FE regarded it as referring to bar 9. In this context, there are no doubts that this indication is valid from the beginning of a new phrase, hence from d2 in bar 8, which we express in the main text, following the FC notation (→GE).
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category imprint: Differences between sources
issues: Centrally placed marks
notation: Verbal indications