[Orgmode] Archiving in same file opens all subtrees and leaves them open

[Tom]

I put an ARCHIVE tag to the beginning of an org file:

#+ARCHIVE: ::* archive


and archived subtrees are put correctly under the archive heading 
in the same file.

The problem is archiving opens all subtrees in the file and leaves them
open and it messes up my nicely folded file. I have to refold the trees
manually to the previous state.

Is it a bug? Why does archiving open unrelated subtrees at all
except for the "archive" tree? And if it does shouldn't it restore
the previous folding state when it's finished?


Org-mode version 6.34c