6x17 A Bird in a Gilded Cage

Wait, what? I thought the whole point was that Stefan couldn't stop feeding once he started, and yet he bit that girl twice and stopped twice? I actually thought this was some kind of ruse to prove to Caroline that she still cared about things, which she obviously does, and Stefan never flipped the switch, but with that ending that seems less likely. Also, if those prison worlds literally reproduce the entire world at the time of creation, with every item in it, couldn't you just make more prison worlds to get more cures? Or any other valuable item from anywhere in the world? If you kept going, you could increase the number of items exponentially: you currently have one cure; create a new prison world, go inside, get the cure from right next to you, bring it back, now you have two cures, and then four, and then eight...
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... I've never been bothered by the huge logic holes in this show before. I wonder if it's because constantly seeing Mon-El puts me in a hyper-critical mood.

I hope they just stop with this "turn off humanity switch" its so boring now. At one point I thought Stefan didnt really turn off his humanity and he ws faking it just for Caroline to realise she does care ... either way this humanity thingy is getting old and boring