I get robojack and bec noir but Lord Jack, i thought he was caliborn's sesions jack? and if not when abouts does calibons session happen in relation to the current updates?

Lord Jack is the Jack from the Alpha kids’ session.  He has Lil’ Cal’s eyes and Crowbar’s crowbar which Gamzee gave him.

Caliborn’s session’s Jack is probably dead since Caliborn said that he would dispose of him once he was done using him.