I called DL and they saw that all seats except our 2 were available on BOTH flights as well. Just seems strange to me that everyone on both of our flights would decide to change off the flight. As a longtime IT person, I don't believe in coincidences. The only thing that makes me think it is valid is that our seat assignments were not lost. I did end up getting our return seats changed... so, now we have 29A/B on outbound and return. I hope they are decent!