Those arrows equipped with short fletching were likely for target shooting.
Flight shooting involves even shorter fletching than target shooting. And some, back in the day, advocated for the center of mass to be located toward the nock instead of toward the point. Their reasoning based on the assumption that a heavy tail would cause the point to ride up and the arrow to plane (like a boat I suppose) through the air just a little farther.
None of that would be good for hunting.