Was bumped 3 times & given vouchers for each bump but when we got home, read the small print & it said you cannot combine the vouchers from each group for a ticket purchase. Saying, 1 voucher is for $ 400 & 1 for $ 200. You cannot add these together for a $600 ticket. Why??? This is like giving candy to a baby and telling him he can't eat it! How can they restrict the way you use the vouchers? Is there anyway to be able to add these together?