I was at SJC airport and trying to use the kiosk to check in my mom who was taking DL1056 and then DL 830 to BOS. I used her DL AMEX card which provided 1 bag checked in for free but the kiosks doesn't recognize this? Shouldn't it recognize it and provide 1 bag check in for free but it was asking me to pay 25$. I had to stand in line and then have the agent manually override it. I was under teh impression they would like more people to get the card.