Im trying to do a clean hands playthrough. i finished a mission and on the stats screen it said i had 1 kill (dont know how/why) so i picked to replay the mission. on the second playhrough i was cool. undetected and no kills. will i still get the clean hands trophy even tho i F'ed up the first time and picked "replay mission"? thanks.

EDIT: Also, durring he lady boyle party mission. if i use a sleep dart on the optional duel part with the guy in the wolf mask will that affect the clean hands trophy?