Every time I called to change my ADRs (and there were a few!), I also checked confirmation numbers. You may want to check the name as well, even though the confirmation number should be good enough. My name got listed as Sandi on a few of the ADRs, and Sandy on the rest. (I'm with an y, by the way). The name had no impact on the confirmations, but it was slightly annoying to be walking around as Sandi with an i.