We have purchased tickets in advance on Delta only to find our seats will be assigned at the gate. Even with early arrivals to the gate, we do not get assigned! This is so frustrating and adds unnessisary anxiety to travel. I am going to look into ANY alternative to using Delta. When we asked why this was happening the gate attendant couldn't say, just that we were to watch and see when we made the "cleared" list on the monitor. It wasn't until we were actually boarding the plane that we were given seats. I've done this with Southwest but there you knew it ahead of time and the tickets were much more reasonable. Shame on you Delta.