Rath, I have no idea of what you're talking about. If you go look at my post, you''ll see that I clearly mention Stratford, not Carcer.
=Tamar, you're absolutely right - although it seems that the timing of Bent's "appearance" is very fortuitous for Moist. In any event, the fact remains that Moist escapes from being hanged for being "a known bank robber" because of Bent's actions, so as the protagonist, he has almost no hand in his own escape. (Except, of course, for the fact that he takes a pie in the face for Vetinari, and warns Vetinari that Bent has a daisy).