More surface area = more growth. The bigger ones are just outcompeting the smaller ones. Best bet is to try and frag a couple of the littler Eagle Eyes out from under the other ones. Either that or get rid of the bigger ones.
look, its survival of the fittest, the smaller zoos on the bottom being overshadowed will grow its way around it or spread out to get more light exposure. i wouldn't worry. or if u really want to, take a sharp xacto knife and cut the smaller ones at the base and glue them somewhere else.