In your first pics, it looks like you topped your plants a couple times. Do you find that autos respond well to topping?
Certain strains react well. If you have a strain that starts flowering right around 20 days. It would be pointless to top. Some autos are later like my sour secret. They start showing sex at 30 days and they react very well to topping. Find out when your strain starts to flower and it could work out very well for you. Another strain that worked out great with topping was Canned Abyss' Spyder.