All in all your plants look pretty good from the pics, just want to say that.
Re: canoeing and stuff, yeah light or heat might be going on but usually with light too intense they will pray real hard too, an evolutionary response so the light energy hits the leaf at an angle where it can take in less... then you get the burnt tips that can't adjust to the energy. You're probably off by just a little, and if you use a light meter or a light meter phone app you can probably find that good ballpark distance to set your light. Temp and RH and circulation can all play hand in hand on making leaves canoe too as a response to the environment. Even if you can't fix it, the plant will live with it. Sometimes a little extra stress makes them throw a little extra resin or trichomes, some just don't have the ability.
Pieces of leaves getting messed with is a critter thing, not a bad idea any point of your grow to give the top a spritz of Captain Jack and the bottom a dose of Mosquito Dunk with your water every now and then if there's bugs around. Both stuff is natural, harmful to bugs but not people or plants. They're better as preventatives though. If you're in a jam you want a contact killer. Even insecticidal soap will get that job done in most cases. The age old advice is let thee soil dry back but I know how that goes, it's cool til it's time to water and then all the assholes come back around. That's where the Dunk and Jack come in.