need help on first grow please. leaf roll up and droop after flush

Hello
First post first grow and having some problems looking for some help.
Here is what Im using and doing. I will try and give info and # pics for clarity
Thanks in advance for your help!


growing in botanicare ready grow
3 gallon pots
1000 watt hps mh mix
temps 74-83
50-60% humidity
feeding using x nutrients suggested feeding basic scheduled, here is a link to it

http://www.pdfdrive.net/feeding-schedule-x-nutrients-hydroponic-nutrients-hydroponics-e2811810.html

ph is was high at 6.2-6.4
now brought down to 6 and wondering what to do next after my flush and mistakes thus far

I am on week 3 of veg and things have been up and down. I thought i had a slight MG deficiency
image 1-5





and some weirdness that im not sure of here
image 6




so I got some cal mag and started giving suggested amounts starting with 3ml and going to 5ml the second feeding still thinking they were suffering form Magnesium deficiency.

The problem seamed to keep getting worse so I suspected nutrient lockup , freaked out and flushed them yesterday. They seamed to like that at first but they when i checked them tonight they look very very very bad
images 7-12



I saw them and freaked out and folier fed them some cal mag because they are still very wet from the flush
but wanted to get them something and still thinking its mg?

please let me know what info you need to try and help
so I am seeking help advise if you please.

Go easy on me, this is my first post, and first grow

The puffy leaves?Stop spraying them. The soil is wet from the flush and spraying the leaves to is drowing it. And i see some heat stress going on (corner of leaves turning up)
they look fine if you just let then dry out.

Thanks for the advise. Do you think they were deficient in the first place?
I have a grip on the heat now and the ph levels going to feed them when they dry out a bit.
I sprayed them last night and they look a lot better this AM but not looking like burnt tips

THe plant will freak out from being overwatered... poke holes in the soil and get a fan on it. It will cut down on the roots being water logged