I can move a DVD that I own to my collection - AGAIN?

Let's say I own The Matrix DVD. I search for 'matrix' among DVDs, hit the 'mine' button, and find it. If I select the checkbox for The Matrix DVD and then click on 'Move to collection' drop down menu and hit Go, then what happens? Nothing? If so, then why does that option even exist? Is this just poor programming?

I'm confused about this feature. Please help!
Thanks in advance!

It's because the search function will display your owned and wanted dvds in that list so you may want to move the wanted ones to the collection.

In general though the 'With selected perform action' dropdown seems redundant since you can just click individually on the items. I may remove that entire section as soon as I add another way of deleting items.