I know that this can happen sometimes if you cheat. For instance, if you set your intelligence and security skill to 99, you can unlock doors that are "Impossible" to unlock. Also, if you are using turbo, it is possible to bypass triggers to important conversations.
My guess is that you just used your 99 security skill to unlock the Vulkar base and everything else, and in the process inadvertently bypassed your party characters.
Last edited by Sithspecter; 06-25-2011 at 12:22 PM.