jiffy pucks stuffing my ph?????

hey all, need help bad... my plants started out fantastic with 100% germ in Jiffy pellets but when i planted them into potting mix the bottom leaves start going yellow (looks like nit def) then some start getting dark spots (thought was mg) other leaves are a lil twisted. Im pretty certain its mixed ph in the one medium (have tried other fixes), the run off from the potting mix is about 7 or 7.2 but when i tested the Jiffy by itself the run off is below 6.4, so im thinking ive got a ph of 7 for most of my container but the medium at the core of the roots is very acidic.
I also noticed that when i added ph adjusted water (6.6) the plant i gave it to looked like it had just sucked a lemon ,im thinking its now very acidic at the core.
now does this sound right, then how can i fix or should i go have another billy and think again.

im going to test one of the seedlings by washing all the JIFFY OUT OF ITS ROOTS AND PUTTING IT IN STRAIGHT POTTING MIX


cheers

I've always had bad luck with growing seed from them but, great results when I use them for clones.
Don't know why.

bump.... still having same problems, do you think if i mixed in some dolomite it might even out the ph of the whole pot????????

Im haveing a hell of a time starting out seed's so far every seed that pop' d died.
im on my second set of seed's now and this is starting to suck on the seed supply.
Im useing the jiffy plug's and the dome. I had a couple of nice root starts also and they still died. looking for help my self. thanks for posting.