A lot of photos, will start sprouting pistils, around week 5 or so, but will only start budding, upon switching the lights, to 12/12. My Larry OG Mom, has pistils on every branch, but she has been under 24/7 lighting for 12 weeks. You may have just gotten your Buckeyes, to indicate early, but not have an autoflower. If your goal is a full auto, I would hit one with auto pollen, preferably the same strain auto pollen you used before. While I have never created an auto strain, I have done a bit of breeding for photos, and have one photo, Razorberry, which I have stabilized. Best of luck bro.
HomieHogleg