The Hungry Samurai said:
I will give all my internets to anyone who can explain why the Termites just up and dropped Bob off with our heroes alive and kicking (kinda) so that he can exposition dump all over the place, tell them that Carrol and Darryl weren't with him, and pretty much kill the Termites element of surprise.
The idea was to throw Rick's group off-balance. They clearly expected Rick and the crew to flip the fuck out in rage, lose their shit and not think clearly, then gather a posse and go looking for them, leaving the most vulnerable members of the survivor group alone in the church, easy pickings. Corralling the zombies to keep Rick and co busy was part of that, because it looked like the cannibals were covering their retreat.
Further, the element of surprise was "surprise, we're not actually at the elementary school chumps!" They thought they'd have quite a bit of time to slaughter everyone in the church then be waiting for Rick and the others when they realized the cannibals might have played them. But they failed to watch the pilot episode, or they'd have known they were screwing with the wrong people. They'd been living for who knows how long basically tricking people to come to Terminus where superior numbers, lay of the land, and the facade of being all nice and chill allowed them to disarm and then overwhelm new people. They'd also been enjoying most likely the pickings of people who were half starved and weak as hell. Like Gareth told rick, "you don't know what it's like to be hungry". They probably hadn't encountered people who were mostly well fed in a long time. Also, they'd only just started to actually be hunters, so they weren't actually that smart.
Also, they themselves were kind of losing their shit, gunning for stupid revenge and being too clever by half.