You don't have a diary for this grow? How can we figure out if you've been underfeeding or not? Don't know how old the grow is, don't know what the pH is, don't know anything about it except that it's an auto... Honestly, the first 2 pics look like a grow that is underfed. The last two photos look like a plant that has a fairly bad nitrogen toxicity which is locking out the potassium and/or phosphorus... simply put, we need a diary here... diaries help us help you... Please, start one! Even if you can only put up one week of it... then, at the bottom of the diary page is a box where you can ask a question... that will link the question to that diary so we can easily go see what's going on...
Good luck....