From your details it looks like you've got everything dialed in nicely so nothing really jumps out at me about what could be wrong. Maybe your reservoir temperature could be lowered a bit. 65 is alright but 70 is getting up there.
Lower your res temps by dropping in frozen 2Ltr Pop (filled with water, of course) bottles. Keep a few in the freezer and switch them out as needed.

I did have a plant once that exhibited the same abnormal growth (one point leaves) as your first plant and that was caused by mites. The second one kinda looks like its getting chewed by some other sort of pest but in all honesty I'm stumped.