On Kashyyyk, you have some more story after the star map, about the Wookiee Rebellion. So you can't directly 'warp' to your dhip afterwards, you'll have to talk with Freyrr (Wookiee in the shadowlands near the Star Map) to start the quest that leads you off the planet.
You can help him take back command (Light Side) or cut him down and allow Chuundar to remain in control (as a Wookiee slave trader).
I can't help you with Korriban though...I believe the 'star map' quest of Korriban should only trigger after finishing 2 or 3 side quests (The Hermit in the hills, etc).
"I think the Devil ****s Dutchmen."