I don't understand why, when viewing top picks, ordered by "recommended", movies aren't sorted by the star rating Movielens predicts for me. For instance, the first movie in my Top Picks has a prediction of 3.5 stars. The second movie has 4 stars. Further down there might be a movie with 4.5 stars.

Surely, when ordered by "recommended", it should be recommended by stars descending? Or how is it sorted?