Sorry Faithless didn't mean to high jack your thread in fact I was going to leave some feed back but when I got down to Justaseeds input I got distracted.
On your clones, they will not always wilt or go threw the yellowing process in my exp. One thing, did the mother you cut them from have any recent feedings with nitrogen? If so they may have allot of stored N in the leaves and it is taking longer to show deficit and may take a little longer to root since the clone can feed off of the stored N rather then send out roots to find nutes.
Adieu