2) PC Windows 10, 64-bit
3) No additional mods
4) See the screeshot bellow, I think it apperead after promoting the soldier to the next rank and thus adding a new perk to the list
5) I can offer a savegame, just let me know if you need one.
The perk Center Mass is neatly aligned in the center of the window.
![Smile :)](./images/smilies/icon_e_smile.gif)
http://imgur.com/a/9cmkP