How did Raistlin lie to them all? How had he utilized the orb while the ship was stuck in the maelstrom?

Raistlin lied to the group when he had wanted to go to Palanthas to study how to use the dragon orb. He had never needed to go to Palanthas to learn how to use the orb, he already knew how to. He utilized the dragon orb to transport himself, and himself only, not even his brother, out of the maelstrom and to a destination of his desire.