On the CM you have a variegation mutation which is showing differents colours on the same leaves : type "variegation mutation on cannabis" in google
The second have a Calcium deficiency , if not it's a nurient burn but you would not have seen that much rust spots.
Your PH is a bit too low as the recommanded low value is more 6.3 and the recommended higher in 7.3 in soil.
here are 2 links , one is a deficiency chart the second is a ph chart in soil
https://www.loudclouds.co/plant-nutrient-deficiency-chart/
https://www.420magazine.com/community/threads/soil-ph-testing-simplify-please.227086/ (scroll a bit )