Leaves curl upwards like a canoe/cano/native boat = too hot (evaporation goes too fast, so the mouths on the leaf close to counter this) Leaves curl downwards = root issues, too much water, or not enough water. Lower and older leaves experiencing issues during flower: don't care. Seriously, if you start to care, your grow will end bad. As long as the plant looks healthy overall, there's no need for worries. Also, you don't have a mite problem. Mites will leave smaller spots, and loads more per leaf. This looks like regular 'bump' damage.
