The 
dynamic hairpins in the copies based directly on [A2] quite significantly differ in their range, although both in CJ and CK the marks are placed more or less symmetrically with respect to the centre of the run. Therefore, one may assume that the situation in [A2] was similar, which points to a more careful notation than in A1. In the main text we reproduce the notation of CK, which does not raise any stylistic doubts, and which probably reproduced the notation of [A2] more faithfully than CJ. The hairpins in EL, adjusted to the semiquaver beaming and maximally extended, must be a result of an editorial revision.
Compare the passage in the sources»
category imprint: Graphic ambiguousness; Differences between sources
issues: Scope of dynamic hairpins, Inaccuracies in JC, Revisions in EL
notation: Articulation, Accents, Hairpins