dotted revision numbers oddity

[Matthieu Moy]

Hi,

I have a very strange case with dotted revision numbers :

$ bzr log http://greensocs.sourceforge.net/pinapa/download/bzr/pinapa/
[...]
revno: 57
message:
  [...]
    ------------------------------------------------------------
    revno: 55.1.5
    merged: Arch-1:Matthieu.Moy at imag.fr--pinapa%pinapa--arrays--0--patch-4
    [...]
    ------------------------------------------------------------
    revno: 55.1.4
    [...]
    ------------------------------------------------------------
    revno: 55.1.1
    [...]
    message:
      tag of Matthieu.Moy at imag.fr--pinapa/pinapa--main--0--patch-41
------------------------------------------------------------
revno: 56
[...]
------------------------------------------------------------
revno: 55
committer: Matthieu Moy <Matthieu.Moy at imag.fr>
timestamp: Mon 2005-04-04 08:59:06 +0000
message:
  Create .libs/ before running "ln -s" in gcc.mk
------------------------------------------------------------

I would have expected revisions showing up after 57 to be numbered
57.something. Here, they are 55.{1,2,3,4,5}.

Is it a bug, or a surprising feature?

(as you might have guessed, this is an import from an arch repo)

Thanks,

-- 
Matthieu