Ideally the LTI would default to the Mobius class that has the same name as the Canvas class. Barring this, however, it shouldn't default to any class, whereas currently it defaults to the alphabetically first class. The first option in the class selection menu should say something like "please select a class." When an existing class is the default, there's the risk that instructors will assume that the right class is selected without checking it. Of course this is user error, but a user-friendly design would minimize the opportunity for user error.