I booked a Spring 2015 ticket with VA ticket number specifically to earn distance-based DL miles. The trip had US domestic DL flights (which would be revenue based), but the rest of the segments were VA-operated. A month ago, DL had a schedule change on their segments, but VA just updated the itin as expected. Then just this past week, I received a confirmation e-mail from DL that looks like a completely new booking with the changed flights AND DL ticket number (006...)! From the e-mail: "Ticket Number: 006... Org Tkt 795..." Is this normal to transfer tickets between carriers? Does this mean I no longer earn distance-based DL miles on the VA operated flights?