Sour Diesel Fem - First Time

What a week! Started off strong, like a herd of turtles. I live in a place where the usual humidity level is -150%, but still I somehow managed to leave the humidifer unattended and high enough that it stuffed up the carbon filter and tanked the ventilation. And yep, I pulled the whole thing- fan and ductwork- down before I realized that. And, after reinstalling the ventilation and getting more fans on the girls, and despite it only being a few hours, I think the girls now have a coke habit - but - it doesn't rub off. Thrips? Treating with an insecticidal soap which is supposed to work on both. Only one plant affected and I am keeping humidty lower and watching them all intently. I fed Sunday evening at lights on, and all week it has been great. No real increase of mildew, one more treatment of soap (3x week), and some defoliation. And then watered last night - so once a week feed with watering every other day. I must have watered slightly early, because although I am watering the same amount (about 1 liter per plant) and it seems I overwatered. Woke this morning to either mild light burn on some leaves of one plant, or - is it possible that this plant had unactivated nutes or something and the watering affected it and somehow created a nutrient burn? Is this thinking in the right direction? Pictures from later in the week are after some defoliation and resultant stretch.