Alsa提早买的优惠问题！

我在alsa网上查 6月20日从barcelona sants到法国nice ville的夜车，提前30 or 15 or 7天的优惠那里写着：

50% Discount

Purchase more than 30 days in advance

Spain - Italy route

Departures from Spain only.

Type of ticket: Single, closed return

Places limited

No changes allowed

No cancellations allowed

Promotion valid to 31/03/2011


可是我明明是从西班牙到法国的route啊，点了优惠没问题吗？？