I assumed Squard's "we" referred to himself and his crew. Squard is a captain, not one of Shirohige's nakama, so he has his own crew - and they have apparently been saved by Shirohige's pirates in the past.

Other than that... Um. I. THIS IS REALLY REALLY BAD. *clings*

(Squard could still be a zombie, because he was MIA and Moria might have done him before he ran into Jinbei? But mostly I'm just saying this because it would hurt less than having him be a traitor. ^^;;;)