[O] Bug: behaviour of org-agenda-earlier with org-agenda-span

[Dieter Faulbaum]

I have a problem in org-version 7.9.2 (from emacs-snapshot):
if I set org-agenda-span to custom 14 (not day, week, month or year)
than the function org-agenda-earlier doesn't go back anymore, it goes
forward instead of.
If I switch the view by org-agenda-week-view or org-agenda-day-view, the
function org-agenda-earlier goes back as expected.
In think this is a bug (by the way it works fine in org-version 7.8.11)?

Emacs  : GNU Emacs 24.2.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)

Dieter