Does ebay actually read open cases before making a final decision?

So we had 4 listings that were purchased by one seller. All 4 were used and put back in box. All 4 were listed as used and pre-owned. Buyer claimed that all 4 where not as described as he thought they were new and sealed. Even with the listings clearly showing that they were all listed as used and pre owned ebay still decided with the buyer and refunded him. How is this possible? Yes, I have appealed.