I could be wrong, but I thought it was pretty obvious that they had their guys in sniper positions and ready to fire as soon as the The Governor did. When bullets suddenly start raining on you from different directions, I don't find it implausible that there could be a moment of uncertainty, and that's all they needed.
What makes you think the angry hidden black dude was smart?
In regards to the C-section, I thought it was implied that Lorie was in too much pain to continue. Unless you're talking about after the C-section, in which she obviously lost too much blood. But seriously… why look a gift horse in the mouth?