Deathtrap'll sometimes restore an enemy's shield instead of yours or an ally's.
Think this was confirmed if you use both The Stare and Buck Up together. Using Buck Up by itself shouldn't cause this.
I don't have The Stare on my Deathtrap and he most certainly tries his heart out to restore a bad guy's shield... he usually gives up after a couple of seconds, though. --- The word of the day is "Legs." Spread it around. GT: TimoInsano