Why isn’t “Owned” correct
The Owned feature is searching your library for the exact edition/format/etc. of the selected item — not just the title. If everything doesn't match exactly, it won't show up as "Owned".
If you want to file a feature request to change this, I’d encourage you to do so on the forums:
www.getsatisfaction.com/deliciousmonster
Note: Remember when posting on the forums, it’s always a good idea to do a search first, to make sure what you’re posting isn’t a duplication of someone else’s topic. Duplicates clutter the forums and make it more difficult for everyone to find what they’re looking for. Also note, when you start a new topic, there are different categories for different kinds of posts (i.e., question, feature request, discussion, or bug). Please make sure you’re opening the appropriate type of thread.