Leafs with weird spots

I don't think it's mold... but I disagree with you when you say it doesn't look like a calmag issue! I think this COULD be the start of a magnesium deficiency. Are these leaves old leaves or new? Magnesium is a mobile nutrient that will manifest deficiency first in older leaves rather than younger ones. If this is the case, hitting it up with some CalMag would not go amiss and may prevent further problems. That being said, the purple stems combined with the discoloration on the leaves might suggest a phosphorus deficiency (if your plant is a purple strain, then the stem color doesn't mean anything and you can basically ignore this bit). If you suspect a phosphorus deficiency, you can do a couple of things - you can nudge your ph level up (phosphorus is more easily absorbed at a higher ph level but don't go over 6.5) and you can increase the temperature as, again, this will help the plant absorb this nutrient... Good luck and enjoy the grow!

It can be the start of excessive nutrients but u said u fixed that issue so she'll he good.

Also nach Schimmel schaut dies nicht aus, ich würde eher weiterhin auf Anzeichen eines Nährstoffüberschusses tippen.