If you think about it he is not, E.G you buy scout this season he is only a few points short of next star, next season he drops a star if your promoted, but the scout for that level is a star higher than that so if he gains a star back he is still 1 star short of the scout for that level!, your scout you bought is say 6* 49, you level up, he becomes a 5* 49 but the scout on the new level will be a few skill points short of 55! soon to gain another star which your scout you bought cant reach yet!!!, it may only stay a scout if you do not get promoted.