More vague writing, tex. That's what it is. Lol. What I think happens in parlay is that Elizabeth catches on that Will and Jack have an understanding. She learns that whoever stabs the heart will be the captain of the Dutchman, thereby defeating Davy. She also sees that Jack wants to do this, so she makes the exchange. What I think happens is that Barbossa figures this out too and sees what's going on. He doesn't want Jack to leave because they need his Piece of 8 to release Calypso (his plan). So I think, "if you got something to say" means "I'm onto you" and Jack says "First to the finish" meaning that he has his plan to be immortal and cheat death forever and Barbossa is just going to have to figure out a way on his own. So then Barbossa nabs the Piece of 8 and lets Jack do his thing because Elizabeth made the order and she is king.