In A 
marks in bars 10 and 12 are written only on the 4th beat in the bar, on 
marks. According to us, the way of their arrangement is a result of the already disappearing in Chopin's times convention of writing marks inside their scope of validity (and not at the beginning). This is how it was understood in FE (→GE,EE), in which the indications were moved before the octave motifs. This phenomenon also appears in bars 50-53 and 60-63, to an even greater extent.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Centrally placed marks
notation: Verbal indications