Discoloration and slight mutation

Nah, pretty typical seedling with no real problems or issues that I can see. Funny leaves are just that, funny, and will not affect how the plant grows or flowers. "Funny" leaves are quite often found on young seedlings as their first priority seems to be making a decent root system and not perfect leaves and it also seems that seedlings can take a while to sort themselves out and "get with the program" and as though it is almost an "experimental" stage at this young age and to find out how to grow "normal" leaves. Cannabis can grow some very strange leaves at times, and is not necessarily a "defect" or anything really to be concerned over and will not affect quality or growth rate. Remember too, no plant will ever have 100% perfect leaves for 100% of the time. I would however suggest not using distilled water, it can actually have a negative impact on plant health by literally sucking out dissolved nutrients and minerals out of the plants cells through a process called "reverse osmosis". Hope this helps,......... Organoman.