Changed my order on ebay?

I don't really know how ebay works so...anyway, I accidentally committed to buying a case that I didn't mean to. I did want one of the cases the seller was selling but I picked the wrong pattern (cheetah instead of leopard.) I e-mailed them right away and they e-mailed back saying they changed my order from cheetah to leopard. But when I checked the order info on my account it still says "Your choice:CHEETAH". Do I need to e-mail them back or should I trust they are going to send the right case? As I said, not really sure how this all works...