This achievement was a pain in the backside to unlock!
What i did was of course load up a new manager career and went straight to the squad tile. You have to change the formation using the new scroll along option instead of going into formations.
So to do this hover over Team Management and you can see the option to scroll along using the RS. Now at first i changed it but moving the RS but it would not unlock, i tried going to a new tab by hitting RB after selecting a formation and still nothing!
From what i remembered when doing it on the 360 version all you have to do is...
Scroll along formations using RS pick any one it doesnt matter then use LS to move over to another box aslong as it is still in the squad tile and BOOM achievement should unlock!
Hope this helps you guys out!