ILGM Wedding Cake Autoflower 3gal hempy

Saw some explosive growth over this last week. The larger two grew 2 feet since last week and put out a significant amount of side branches with a ton of really nice bud sites forming. Of the smaller two, one is preflowering and has doubled in height, the other has not entered the preflower stage yet but is showing increased growth. I've heard of some autoflower varieties not being very well stabilized, so I'm wondering if the photoperiod seeds were not bred out well. Out of hundreds of grows I've only grown a handful of autos and I'm still learning a lot about them. I've been doing nothing but heavy feeds on all of the ladies and they cannot get enough! Despite the constant heavy feeds the larger two need some extra phosphorous and the smaller need some extra nitrogen for a week, so I'm keeping the smaller on a 50/50 veg/bloom diet and bumping the larger to a full bloom. So far absolutely no issues have presented. No deficiencies, no pests.. this has been a great grow so far and I'm excited to see how these flowers develop.