I'm trying to book our train to Madrid on the 18th of February. When I put in 2 passengers, it shows the Promo fares as 26 euros per passenger. However, if I only put 1 passenger, it becomes 19.95... Should I book each individual tickets to avail of a cheaper price? or would the lower one-passenger fare meant there's only one seat left for that price, and therefore we won't be sitting together as there's no assigned seat if I booked separately?? Thanks.