lubuntu artwork -- two versions?

[Hitesh Shah]

I've added the artwork ppa to my otherwise default Lubuntu 12.10 (clean
installation) so that I see
http://ppa.launchpad.net/lubuntu-art/daily/ubuntu quantal main listed in
the "Other Software" tab of Software Sources. (I unticked the source code).

However, when I run dpkg --get-selections, I'm seeing both
lubuntu-artwork
and
lubuntu-artwork-13-04
as installed.

Is that the way it should be?
How do I know which version is actually in effect?
Should I remove the plain "lubuntu-artwork"?

In case it is relevant, I have both /usr/share/themes as well as ~/.themes.

One more question ... which files are part of lubuntu-artwork?
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