YOU KNOW HOW TO GROW?? PICS AND Detailed explanation of grow environment!

SOOOO, now that ive got your attention, i am in need of your opinions and advice. im a newbie grower, but ive done my home work just finding it hard to be confident with my diagnosis.

GROWSETUP
DINAFEM Auto CHEESE
4f high-1.6f deep-2.2feet wide
240w CFL 3 veg bulbs, 9 flower bulbs.
1gal pot. 40% plain soil. 60% miracle grow 0.14-0.14-0.14
plant prod 15-30-15 used from week 2.5 - 4. at 1/4 dose
oscillating fan on 24/7
room had very high temps until 1 week ago when i installed a bathroom fan that is pulling in air and kping my room cool
plant height 6.5 inches( lower branches are lst outwards.)


Here are my 2 plants the one on the left is 6days old doing just great, the plant on the right is 5.5 weeks it has been in flowering for aboout 1 1/2 weeks.

mabey you can tell from the picture above, but the plant on the right is my the only problem i have left to face, because my temperature is now very good, somewhere between 19 C and 22 C and humidity is low. N overdose is my first thought, all old growth is dark green and curling in slightly. Also a build up of salts and HIGH PH in my medium. ive been using tap water thats been left out for days, but there is a different type of chlorine used in my tap watter that cannot be evapourated by this method. the tap water must be above 7ph. after using botteled water and gettting worse results, i went out and bought distilled labbrador water that is 5PPM and contains basically nothing besides h2o. so im left to belive that i have a major build up in salts and nutrients in my soil and i decided to flush today. my pot is approx. 1 gallon in size and i used 3.5 liters of my new water to flush.

there is also 3 older leaves that have now turned yellow and dried up im not sure on this one and need some help.

-will the damage from these defs effect my final product?
-what can i look for in signs of improvement?
-and since im using a small pot, and she is probably rootbound, will that stress my plant or only effect the yeild??

Definitely N toxicity I would say.
If corrected soon, these shouldn't affect your final product.
PH correctly, and half the concentration of nutes you've been giving (if any). Make sure you don't overwater after the flush.
1gal pot is really tiny. It's a bit of stress, but I would say much less stress than a transplant/trim. It will definitely affect the yield.

What he said....a good transplant...make sure you let them dry out also before watering over and over ya know but other then that you should be fine bro

hopefully i washed out all the slowrelease nute or else i just fucked yself???

any idea on the last pic? MG def? Ca def? i really dont know. those leaves stayed yellow but still got crispy after 2 weeks

with a 1 gal pot, would youthink Over or under 7G?

i think under since she is an auto

What I see is a classic case of over watering and nute lock out...one at a time though, first, the leaves curling down with no yellow or crispy tips is over watering, second, the yellowing and dieing off of the older leaves and slow growth of the entire plant, IMO, is from either a bad PH or to much Mag, which is basically salt and should be used in moderation with watering and nutes....here is a healthy 3 week old plant..

thats what i was thinking. will the curling leaves uncurl when my soil ph lowers from the flush??