To start with I normaly don't fk with autos...It was a buying mistake by my dumbass...That being said I figured I would grow them instead of throwing them in the trash...I would say it is a sativa auto...(Amnesia) I usually don't fk with sativas either...But the other half wanted some sativa so that's what sent me down the sativa road...I fed them the same thing I feed all my grows, I didn't change anything...I feed my photos. a good amount of nitrogen in veg...So what your saying about nitrogen stalling them could very well be true...They are on flowering nutrients now and have been for a bit, which is very low nitrogen... Funny thing is all I did was post 2 pics. of 2 stupid autos...and got responses like I asked a question...I'll grow em out and be done with them...The other 4 of them will just sit in my collection of seeds, maybe someone will grow them after I am long gone along with the 100s of photos I will never be able to grow in my life time...

there's nothing wrong with a sativa man, personally I love them and prefer them. but i want to make sure you know I was not making fun of anything you were doing or anything like that, I just have experience with sativas an I thought id help out if I could. 

A few tips i can give to help out would be to mention the darkness cycle, even though it is an auto it will flower faster with more darkness. More light = more bud but you also get a longer seed to harvest. 

my second tip would be to give it 1-2 days of pure darkness to push it into flower a little faster and you could fix the light schedule back afterwards.