I got hammered on 1 item 5 times. Constantly delisted for category and a couple of other things. Just keep replying back to Ebay. I found I was target by another person who just kept reporting. Maybe its wasnt now I read this but Ebay themselves doing something or testing a new system?! 

All my other ones were fine. In the end the 5th delisting of the same item was advised it should belong back in a particular category (It was in fact the same category it was first delisted from !) Talk about frustration. I started a thread like you.

Persist and keep replying back to them.