Re: WTF?! No, Seriously! WTF?!
I'm with Penfold and Jarrod on this one. I'm so glad to have Jack back I'm willing to wait for things to be explained. So I'm assuming that First Son Roger was working on the basis of info druggie friend gave him ... and First Girlfriend didn't necessarily get the truth from Roger, because she hated his friend anyway. He could have lied to her about the origin of the info (to make it valid to her), and she perpetuated the lie to First Dude. I'm hoping we'll get more details to flesh things out as the series goes on.
Remember, they like to give us info two ways: we learn things as Jack does (or other characters), and we get tensions/twists along the way as we learn. Or we know more than the character does, so we see them getting into trouble and get tension that way (ie No! Don't go behind that door!) So this could be an example of the latter.
"O fan from me the witless chaff of such a writer!" --Shakespeare