Well perhaps bhuric got the exact system incorrect but I know for a fact that it's possible because I've done it. Many times I'll have a 5+ to str, a 3+ to will, a 3+ to agi and 2+ to various other attributes. I have no idea what the exact calucalation for bonuses is.
Damn you play at a nice resolution
Update: Wait a sec, I hope that screenshot is from after your experiment because you have a level up indicator in the corner there. I said you have to get those skills to increase before that happens. Or else all those bonuses will be carried over to your next level increase.This comment was edited on Mar 28, 03:05.