crescendo & decrescendo marks not end correctly

[Fan Hongtao]

When I write note of Bach's Minuet, I find that LilyPond do not write
crescendo & decrescendo mark the way I want.

With beams 21~ 24, I write something like :

  a8([\< b] cis[ d] e fis |
  g4)\! fis-. e-.\> |
  fis4-. a,( cis |
  d2.)\! |\break

The crescendo mark is supposed to be end at the "g4" (first pitch of line
2), but it ends at "fis" (last pitch of line 1).
The decrescendo mark  is supposed to be end at the "d2". (first pitch of
line 4), but it ends at "cis" (last pitch of line 3).

The original note picture can be found in:
    http://www.8notes.com/scores/2402.asp

-- 
Best Wishes,
Fan Hongtao
----------------------------------------------------
I have a dream.
http://fanhongtao.github.io/ <http://www.fanhongtao.org/>