It does look to me like the plant is flipping, just taking her time. It happens sometimes. This Moby Dick XXL almost had me in tears, but she came through in the end. Took 126 days. As you can see not much happening after 7 weeks.
Wait.. Are your other plants autos? If so, why would you be concerned with switching the light cycle for 2 weeks or so to see if the problem plant starts to flower under 12/12? Otherwise you'll just be wasting space, lights, nutrients etc on a vegging plant.
if it aint gonna flower, i don't want it. tomorrow marks 8 full weeks.
so my question is, has anyone had an auto flower this late before? Because i am thinking maybe its a photo, and i received the wrong seeds.