Thanks SOooooo much raze.
It's wonderful to know I can edit my resistance with the save editor by putting and removing points.
I can't really remove the magic barrier from my objects since I can't set other skills, because my objects with magic barrier have a second skill I wouldn't like to lose (or maybe my belt doesn't, I have to check. My amulet and armor do have a second one)
But at worst, I'll just get my skills down so the total is 5 or less.
I guess what you say was logical: it's precisely because the points are applied instantly and are not re-computed in function of the number of skill points that there is this bug:
say I have 25 resistances, with 5 skills and a +1 because of an object.
the 25 is set in the file regardless of the skills. When I remove the object, it is counted as if it should remove 5 points, since the game does not deal with it by counting the points.
If I put it again, the game knows I have already 5 points in the skill (well, it has to check to modify the skill level), and thus does not increase the res stats.
I've lost 5 points...
Silly bug.
As for the topic on changing/duplicating items, I had followed it and it didn't seem to give anything good for my unique items, but I'll read it again and try again.
In any case thanks, you really saved this game for me. I would have sold it for peanuts out of frustration (it was the fourth time I tried and each of the three first times, a major bug had killed my game, then I tried a fourth one with 1.34, and everything was OK until now when I found myself with -50 every res'. Small bug, major consequences)
Thanks, thanks, thanks