Irish kilt pleated in front?

[DRipper]

In those raven piper bands, I noticed that it seemed as if the children had the circular pleating,(possibly due to parents forming them to a "uniform" look through instructions, or preconceptions,) but the Robbie Cowley pic, one good clear one of an adult in kilt, clearly has a solid front apron with a pin on the left side of the apron, John Rooney the drummer, while faded the pic clearly shows a flat apron in the front, so this shows that both pleating styles were present in the same piping group