iPod shuffle mode & the Mountain Goats

So I have two Mountain Goats records on my iPod, Tallahassee and We Shall All be Healed. I set both of them playing on shuffle. The thing proceeded to play them both, start to finish, in the correct track order. The only thing is that it played the second album first. Yes, I'm sure it was on "shuffle songs" and not "shuffle albums." What kind of cosmic alignment insanity caused this?