Did they know she had anything to do with founding the Rebellion? She was removed from the meeting just before Vader arrived. And what did she do on Kashyyk? Nothing, because a rogue Jedi did all the damage. Seems likely Palpatine could not legitimately tie anything to her until later on when she stole DS plans and Vader found her. Nothing wrong with Vader being captured since he was beaten in a battle, shame they aren't going to do a 3rd game where the opening level could be Vader busting out and pwning the entire crew. The EU is still to be enjoyed, just think of it as professional fan fiction and/or alternative versions of events. Plenty of other franchises do that stuff, Star Wars shouldn't be any different. Besides, the new movies are likely to contradict much of the post ROTJ EU material anyway.