Why does my iPad show music files after unsyncing all music?

Question

I've got major issues with trying to get my iPad to sync music, but noticed that after I've unsynced ALL music, my iPad still shows 11 music files. They're not showing in my music content as playable tracks. How do I get these files off my iPad?
Background: I believe these files are an album I bought from iTunes on my iPad. But these files wouldn't copy across to my iTunes library on my PC, and I can't view my purchases in the Store without iTunes crashing. So the album seems to be trapped in the depths of my iPad somewhere.
My problems with syncing music started after this, so I am hoping that getting rid of these files will resolve my other syncing issues. If not, I'll tackle those later. First step, how do I get rid of these music files?

Answer 1

How Do I Get Rid Of The “Other” Data Stored On My iPad Or iPhone?
http://tinyurl.com/85w6xwn
With an iOS device, the “Other” space in iTunes is used to store things like documents, settings, caches, and a few other important items. If you sync lots of documents to apps like GoodReader, DropCopy, or anything else that reads external files, your storage use can skyrocket. With iOS 5/6, you can see exactly which applications are taking up the most space. Just head to Settings > General > Usage, and tap the button labeled Show All Apps. The storage section will show you the app and how much storage space it is taking up. Tap on the app name to get a description of the additional storage space being used by the app’s documents and data. You can remove the storage-hogging application and all of its data directly from this screen, or manually remove the data by opening the app. Some applications, especially those designed by Apple, will allow you to remove stored data by swiping from left to right on the item to reveal a Delete button.
 Cheers, Tom