Yup, autoflowers just do things according to their OWN schedule - and you happen to have one that has a weird schedule... there's no way to change up their schedule - that's built into their genetics ... so underwatering can't bring them into flower, flipping lights to 12/12 can't bring them into flower, nothing can MAKE them flower OR hold them back from flowering when they want to...
I would definitely do some LST on this grow to get the lower bud sites more light and increase the yield... otherwise, you're probably not going to get much out of her.
Good luck with her ... she's just a headstrong lady!