Sorry for make you lose your time.
Using the package version of 20141124 of org, the bug is present, but in the git master, it's solved in a nicer way. By in the org-capture-place-entry function getting out of the cond the test of :exact-position
Package version:
(cond
((org-capture-get :exact-position)
(goto-char (org-capture-get :exact-position)))
((not target-entry-p)
Git Master version:
(and (org-capture-get :exact-position)
(goto-char (org-capture-get :exact-position)))
(cond
((not target-entry-p)
Thank you very much.