LVL lashes problems

Hey guys ,
I done my Lvl course a few months ago , but it still takes me ages to pin the lashes up. The wet line is always really turned out , is this normal ?
As I read that this effects the result of the lift ? But I don't understand why ?
Anybody shed any light ?
But I can't seem to pin the lashes without this happening!
Also how far does everyone take the serum up the lashes?
Any tips or advice on LVL'S would be fab X