Were I you, I'd ditch the Superthrive from your regimin and see how the plant(s) react. You soil is pre-fertilized, and I am doubtful that at this early stage you need ammendments or additives. Especially in mega-doses. (10 drops of Superthrive per gallon is a mega-dose)

Personally...I stopped using Superthrive a few years ago with no regrets. The only place it's ever been proven effective for cannabis, is in the mind(s) of cannabis gardeners. And since nobody knows the formula, what kind of residue are you smoking when you do use it? Will it interract with other meds you are taking? Regardless, it's an overdose. On your next watering day you'll likely want to flush with properly ph'd water. (let the soil dry between waterings, feedings, flushes...)