Pic 1......first signs of burning from feeding too much or too often.........or both.
Pic 2.... first signs of new branches growing.
If you go to week 7 in my diary "cannabis conundrums", I have posted pictures of male and female pre-flowers and these may help you to identify what is going on with your plant once it starts to flower, or what to look for at least. There are also many other pictures or weird and wonderful things cannabis is capable of, which you might also find interesting.
Also, it is unnecessary to spray your plants' leaves with water, this can actually do more harm than good.
I am not sure how often you are feeding, but a plant this size, if started with quality soil mix, should have a schedule of plain water/plain water/feed/plain water/plain water/feed.....so that it is only being fed every 12 days or so, which is plenty for an auto this size.
Hope this helps, Organoman.