One of two things happened here (possibly both).. Either the plants hermed, or the previous plants hermed, and left over pollen got on these plants. Did you sanitize the tent before the new grow? Wipe down fans ect? If not, thats a major possibility. But based on your most recent post, it's safe to say that your current plant hermed. The recent pics you posted look exactly like "bananas", or "nanners", as they're called. They are opened pollen sacs, on female flowers. After you harvest you need to clean everything in the tent to make sure that pollen isn't lingering around.
You can pull off those nanners, but there are probably a few more you'll find while pulling those off.