The pistol chart you refer to is based on the assumption that POA and POI are correct and it points one to possible factors a shooter may introduces.
So how are you zeroing the scope? While it sounds like a basic question there are several ways.
Also as edgecrushers is asking what distance are you initially sighting and then if moving out to 25yds the bullet is likely still on an upward trajectory.
Useful information is rifle,caliber,scope, ring height,distance your 'dry' sighting