No one has asked yet as to what range this scope is zeroed at... ?
If you have it set for a considerable amount of range or if your bb/power/hop combination just results in a heavy drop then you have the point of aim (poa) set low, what you are seeing is the BB actually aligning with the poa twice.
Take this picture for example. (Ignore the actual numeral figures.)
Say the yards are feet and this graph is to the extreme, if you have your scope zeroed in to match the poa with the point of impact (poi) at 250ft then you are actually going to have two areas where the poa matches the poi. Thus giving the illusion of a flat shooting rifle to have the illusion of over hop through optics.
If you have it set for a considerable amount of range or if your bb/power/hop combination just results in a heavy drop then you have the point of aim (poa) set low, what you are seeing is the BB actually aligning with the poa twice.
Take this picture for example. (Ignore the actual numeral figures.)

Say the yards are feet and this graph is to the extreme, if you have your scope zeroed in to match the poa with the point of impact (poi) at 250ft then you are actually going to have two areas where the poa matches the poi. Thus giving the illusion of a flat shooting rifle to have the illusion of over hop through optics.