The common denominator of those with issues is mixing mediums and not using water only. Always remember that these feed charts and recommendations that companies make are based on photo period plants. Im not sure if the "girl flower" product is even needed. I add coconut water during flower and that's about it with autos. You're still in good spot, I've seen much worse, with even longer to go.
Layering makes no sense when you pull back and think about it. Especially when they tell you to put the hot layer at the bottom. Tap roots grow straight down until it hits the bottom, then branches off or prunes. It doesnt stop and hang out in whichever layer it like most, lol. So a seedlings tap root is headed straight for the hot layer, or super soil.. And when it branches off or prunes, those new roots will be mainly in that bottom layer as well. By the time the roots are established well enough that roots are growing in all the layers, issues are already showing.
So in your case, that's something to keep in mind.. The issues like tip burn, rust spots etc. could be a result of the layering and not something you've watered in or added.
Also keep in mind that living soils are designed to be reused over and over again, and as you reuse them, the better they get... So the less you'll have to do. I have living soil pots that I grow autos in from start to finish without adding a thing..
Maybe looking at it like this well help those urges, lol. You basically have two options when growing.. You can feed the PLANT (bottled nutrients), or you can feed the SOIL (organics) which will in turn, feeds the plant. Feeding the soil requires far less maintenance than feeding the plant. The urges to "do something" come from wanting to feed the plant. But that's not how your growing right now. Keep growing that patience along side the plants and you'll be fine, lol. Cheers!
HF, 
