Hey all!
Well, I made my first oops. After 10 levels of awesome Sith Warrior action, I accidently chose the wrong AC.
Opened a ticket and the GM said there was nothing they could do.
So, if I may take the time to suggest a choice option for major no-going-back type choices like this. Would help derps like me to not make mistakes. Even of the miss-click variety.
Note: The GM was very fast to respond and great to talk to, even if they RP you a bit. Kudos BioWare.