Hi, i see no big probem in your grow. maybe the lights were to close to the plants, for me it looks like a lightburn. If i look at the pictures i see plants with very close nodes.. that means the light is to heavy/ to near to them they are dwarfing.
And dong trianing on autos depends on the strain you grow. Most of them respond very well to LST. Its always a good tool in automatics. Solutions: dimm or rise the lights.. they are very heavy.. you will see in days, that your plant begin to stretch.
After stretching start some LST. You can do Lst until second week of flowering, after that point its to late. If you are unsure, just let them grow and do LSt in your next grow if you are used to your setup. Feel free to look into my diaries( ive grown a lot automatics last year) happy growing