Sup Hans Nice selection of strains your growin here, very interesting to watch come along. As far as the mutation part of the pk both ones I am growing have had an extra lil leaf on their first set of leaves also on one side. So I guess this is common from pk.. idk for sure, I wouldn't be concerned.
My PK was the same.







So firstly, for these nutes 4ml/L would be considered "full strength". Secondly, you say you're using a 10 gal res to hold your water but I wouldn't suggest mixing your nutes directly in there, if you're growing more than 1 plant they may require different strength feedings etc. I use a 5 gal bucket for my RO water which I keep bubbling 24/7 but I use a 4L water jug to actually mix the nutes in and water the plants with. (4L is around 1 gallon btw) Next I would suggest you pick up a plastic syringe with ml measurements for actually adding the nutrients (see pic), this makes things easy you just stick it in the nutrient bottle and suck up exactly what you need. So if I wanted to feed at 1/4 strength I would add 4ml of each grow,micro,bloom bottle to my 4L water jug. Hope that helps a bit, happy to answer any other questions.