I did talk to them, however because I opted to have the tickets FedEx'ed to me they have "been issued" so now the only way to fix this issue is at guest services at the park and only if there are still Express passes available for that day. No, I won't be loosing any sleep, there is enough time that I can plan around this and make contingencies. No worries, it just would have been nice if they could have just changed out the tickets.