I don't think the clawing of the leaves is because you over watered. Also because you say watered 2 days ago, I think she is doing this because of the nutrients. I am a plagron user myself and the green sensation is strong stuff, i should lower this a bit at least. or give a few days PH water with cal/mag only, I give my auto's only 3 times in a grow while flowering a PK boost. It does the trick for me, I hope this could help you out a little bit, good luck with your grow ;-)