Corrupted or damaged documents that have already been returned/ expired.

I'm seeking help on removing corrupted documents that have already been returned. Everytime I download an Ebook, I keep seeing duplicates of other documents that I previously downloaded. I tried removing them from the library and reopening ADE, but they keep coming back. There are also situations where I download an Ebook and the library shows the book as being expired. I even tried re-installing ADE but it didn't help.