On the Premium Movie "Pirate Fairy" and "Thor", as examples, it shows a "G" rating but the duration is empty but followed by "min" (units of time). First, the duration should never be empty, and second, if it is empty we should not display "min".
Note also that on Premium movies that include a duration, the length is indicated with "min" twice, e.g. The Fifth State displays the length as "128 min. min