Definitely a hijacked account.
Both Ebay and Itunes are two accounts I have had that were hacked into.
I logged into ebay one day and had all these auctions running that I had never started. I still don't know how the hijacker was going to collect there money because my paypal acct was fine...maybe money order?
...and had downloaded one song from Itunes back in like '05 and never used the account again and then last year get a bill from my credit card for like 280 songs. Apples stance was that its my account, my problem, so my credit card just refunded me the money and sent me a new card.