Pose vs Rest position are different I'm using a manuel Bastioni model and trying to add a facial rig. When I weight paint the eye lids even though they are at 100% they don't follow the bone all the way. Only when I remove them from the head deform bone will they follow the eyelid bone. 
The other problem which might be related is that pose and rest mode are different. I tried to find the IK constraint that might be causing this, but I can't... Any help would be appreciated. link to the blend file:
https://drive.google.com/file/d/13uL7Bso-9EbK9btwYCpp1Tp_xsf815J1/view?usp=sharing
thanks in advance
In the Properties panel > Data > Skeleton, display all the layers so that you can see all the bones, now you can check the influence of the different bones, for example the head bone has an influence on the lids so of course the lid bones won't influence them 100%.

Also, if the bones in Pose mode have a different position, it's because they are influenced by some constraints like Copy Rotation or IK. To get exactly the same position as in Edit mode it may need some small bone readjustments.