Hi, so there are two things that you have to consider. The first thing is the requirement which allows you to put the player in the evo. The second thing is a max cap of playstyles the player can receive through the evolution. In both of your mentioned evolutions the requirement is "Max 4 PS" and the cap is also "Max 4 PS". So you cannot receive the PS as a fifth PS. So it is not really a bug but for me the requirement doesn't make sense. Maybe they will change it. Until then, always pay attention to the max cap first before you activate the evolution. Hope this helps :)