What was the context for the original post? What plane are you flying? Some planes, like high wings that use flat bottom wings will show this behavior to a certain extent... it is normal.

Incidence is the angle of the wing or stab with respect to a datum or centerline on the plane. You typically need an incidence meter to properly measure these angles. The relative incidence would be how the incidence of the wing relates to the stab, i.e. wing might be -2 degrees while the stab might be +1 degree.