Window use time and display-buffer

[martin rudalics]

If with emacs -Q I do

(progn
  (split-window)
  (split-window)
  (display-buffer (get-buffer-create "*b1*") '((display-buffer-use-some-window) 
. nil))
  (display-buffer (get-buffer-create "*b2*") '((display-buffer-use-some-window) 
. nil)))

the same window is used to first display *b1* and then *b2*.  I'm afraid
this is not really what should happen here.  But do we care?

martin