I should have mentioned this when I booked them, rather than now that I'm dealing with getting ready for our Thanksgiving flights this weekend, but there is an ETC issue that I'm wondering about.

The missus and I had two ETCs (one each) that we wanted to use to book for our flight. I set up the itin, and tried to enter the two codes, but only one would take. When I separated the PNRs, we still had some hiccups. co.com support took care of getting the ETCs applied.

It wasn't an issue at the time, since I didn't realize that the time you could split the PNR later for EUA purposes (I don't even know if CO had said we could do when I booked in August), and we really don't plan on more than 2 suitcases at 70#, but next time....