thanks for your replies everyone. i appreciate all your help!

rusty- thanks for helping! yeah maybe not a good idea to switch back and forth. was following a few old school growers threads who had really good results with both these nuts. one switching back and forth. the other not. everything they said about both nuts made a lot of sense to me, so��supposedly the jacks is way better than the miracle grow, but, what do i know really?
with the sunshine mix ive been doing water, feed, water with plenty of runoff each time to limit the build up. definitely been following both nuts schedules as per bottle, but have read so many conflicting opinions about following the bottles vs following a more scheduled ec increase by week. like week 3 1.0, week 4, 1.2 etc. been confused about that for sure and have been trying to read the plants. not so good at that yet i guess.
i amended the sunshine initially with the perlite and im not sure if this is my issue???? my room temps and humidity are pretty controlled and stable.

headshake- thanks for your response! i added lime after reading as much as i could about the sunshine mix and the lime it comes with not sticking around as long as i need it. my veg is long and when i pot up for the bloom room yeah they're in the pot about two months. think i shouldn't? and the mix really doesn't have much nutes in it at all - pretty inert after a week or so.

randm999- yeah, i thought they were overnuted too, which is why i flushed initially. the first two pics are before the flush, and the next ones are the same leaf/plant issues popping up again after picking off the destroyed leaves. the sunshine mix only has an initial starter charge of about a week or soâ?¦ these plant, though surely very stunted are more than a month old. i did repot some of the larger ones that had lots of roots swirling around last night into new mix though. i didn't flush.