So, situation is:Mouseferatu said:He deals sneak attack damage.
Alertness is very specific; you don't grant CA for surprise. First Strike is a different situation.
Andur said:Given First Strike,wouldn't he get Sneak Attack in both the Surprise Round and the First Round if he wins initiative? (Don't have books on me atm)

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.