Actually it's not too strange if the recommended players are 5* instead of 6*
The Rec. Players system tries to find you players, it's not guaranteed that it will find players that you would ALWAYS want to buy. It's just an extra option.
What got my attention was the fact that the recommended players are so old, especially the right-most one, 34 eesh.
I'll bring the screenshot to the attention of the devs, but I am still not sure if it's an actual issues due to the nature of the Rec. Players feature.
Btw, even if the players are shown with 5* instead of 6* do check out how many % they need for the next star. Because they may be 1% off which basically makes them 6* players. Just gotta play a match with them or put 'em in a training session.