You'll only get the 3000 bonus once.

You will get status miles according to the booking class. As FTL, in P, 750+188, in Z 1250+313, 2000+500 in D,C,J.
Since you say 4689 award miles, it looks like an expensive fare. Say it is in D, you'll get 2500 euros / leg, 4 legs, double status miles plus the one time bonus = 23,000 status miles