How to properly use a AimOffsetBlend1D

My original question:…moffsetblend1d

I am struggling because my character does not my “target” animation, just barely lifts the arm:

Normally an Aim offset requires all the animations to work correctly:

Basically you need to add all 9 frames for it to work correctly as shown here:

I use AimOffsetBlend1D which is only one axis! No looking left, no looking right. So this does not explain my problem, because all bounds are set.