I have chosen the weapon finesse feat and i am currently equipped with a small blade (thy dunags), i have 13str 22dex (lvl 4 fighter lvl 5 rogue lightfoot halfling) but in the weapon stats screen there is "damage potential 3-8" strength +1 ....

do i have to turn weapon finesse on?? if so i cant find it where rapid shot is...
ps: i use crossbow have 1 attack/round, turn rapid shot->on: still 1 per round... what's wrong??