When you look at CI/Daily the default appearance of the channel is *undefined* for a variety of builds. Would this have something to do with it?

eg
http://mozmill-daily.blargon7.com/#/update/overview?branch=All&channel=All&from=2014-01-16&to=2014-01-23
http://mozmill-daily.blargon7.com/#/update/detail?branch=All&channel=undefined&from=2014-01-16&to=2014-01-23&target=29.0a1