it's been a long time since i edited a mass effect 2 save (i deleted all my gamesave by accident), but that usually happens when you go over the games max, i can't remember it ever happening to me but i used to just edit them to something like 9,999,999 same as creddits. ammo edited to something like 9,999,999 heavy ammo uses the second value (ammo used and in a minus number rather than positive) rather than the first value like the rest of the ammo types in the gibbed editor under the raw tab - squad section - player section - weapon collection their powers can't seem to be changed without corrupting the save and you can edit the henchmen tallent points in the same player section henchmen collection you only need about 100 tallent points to max everything i think. (i'll have make a new set of saves later and get a few save's uploaded for renegade to take a look at later).