Auto Northern Lights x Blueberry

Week 2 had some issues that were mostly due to human error, I presume, but also one finicky little plant. The front plant is healthy, green and growing quickly. The back two seem to have issues.. the symptoms are droopy leaves along with yellowing and some weird purple coming from the middle. I suspect over watering. I have been very diligent to only give them a small amount of water, slowly dripping in circles around the plant (I use a turkey baster! lol!), nearly exactly 2 oz of water to each plant. I wait until the soil drys out, and I dig down and inch to find moisture before watering again. I also lift the pot to make sure they are not water logged, which they aren't, they feel light and dry. Although I have been very careful, the symptoms still point to over-watering. I let them dry out for a day longer than I normally would, and they started to bounce back! I could see them perking up a bit. The yellow new growth turned into a darker green. Then all of a sudden they drooped harder than they had before. Leaves nearly touching the dirt. I gave each plant 1 oz of water, hardly a shot glass full, and by morning they were looking healthy again. I suspect theses babies are just finicky plants. Hoping to get through another week without stunning or stunting them. Any pointers would be greatly appreciated!