same thing happened to me also...called customer service and they are going to credit my paypal the 20 dollars back once its processed. So give them a call they should be able to straighten it out.
On a side not got a call from reebok.com today and they left a voicemail telling me they had...
woke up hoping to score of finishline. WTF? Was going to use them for my winners circle rewards and hopefully a coupon! I guess set my alarm for no reason, thanks finishline!