Autoflower not so autoflowery lol

First off I apologize for the terrible photos. Cheap phone. I have a Low Girl auto flower from advanced seeds through the "tude". After about thirty days after sprouting it was probably 7 or 8 inches tall in soil. So I know is was terribly stunted. Freaking out, I took it out (still in its rock-wool). and placed it in a dwc in a 5 gal bucket. after the transplant it took off but still showing problems. Its showed female so i've switched to bloom nutes. 1/4 to 1/2 strength. And switched it from a 400w mh to a personal 150w hps in another room. Now on day 53 shes 15 1/2 inches tall. Now I've got bigger problems. short after explosively shooting out pistils. The first two sets have began to turn amberish and almost crumble like away i believe. Haven't touched it but seems they're falling off. And The seed I purchased was misshaped and light yellow. As if It were immature or defective. But I did not even expect it to grow.

any idea whats causes this or has anyone dealt with it in the passed. All post are appreciated

You went from 400 watts down to 150?

yeah bout a week or two after showing pistils. bec my 400w is mh and is a veg room. so i moved it to its own personal 150hps in its own room to avoid being pollinated and so it could bud a soon as possible to max the yield.