How is Obama not a two-faced liar?

See Obama's answers to Question #10 here:

I also reject the view, suggested in memoranda by the Department of Justice, that the President may do whatever he deems necessary to protect national security, and that he may torture people in defiance of congressional enactments.

...

The creation of military commissions, without congressional authorization, was unlawful (as the Supreme Court held) and a bad idea.

Obama seems to have a different perspective on these issues now. Perhaps Candidate Obama was a disguise.