Before I gave up on her, I'd actually flip her to 12/12 to see if you accidently got a photoperiod rather than an autoflower seed... She looks terribly healthy, you haven't done anything that would interrupt her schedule (topping or any other HST) - so try flipping her!
Seed banks will sometimes make mistakes... I once ordered 5 seeds of the same strain from a seed bank (not this one) and got 4 of what I ordered and a seed of some other strain... I really wished I could know what that other seed was because it was heads and shoulders better than the ones I thought I was going to like... but shit happens.. LOL!
Good luck! I'll bet she's a photo...