Yes, I meant True Shot; in the disk version of the game the skill does not actually add a damage bonus (same with the damage portion of Crossbow Expertise). True Sight works fine, but there are few opponents in the game that use invisibility, so it is not worth the skill points to learn.
I did most of Rivertown and Verdistis before entering Stormfist castle, and only after that went to the Dark Forest.
For the quest with the vampire, the number of points lost and where from is random, but I'm not sure when it is determined. From 1 to 4 points can be lost, though 3 is by far the most common; I think one point I lost was in constitution and then the third came from strength or agility.