yeah, that's correct
although i can't be certain i just always assumed this had to do w/ the fact that for each position, OVR rating is calculated differently (of course).
since attributes are changed by using the editor-- & thus OVR is also changed within the editor for altered players-- i just assumed Finn left it up to the game to determine what the new OVR is when it re-opened an edited gamesave... rather than determine what the formula is himself for each of the 17 or so positions