I've noticed that if the meshes are changed after the esp is made then it will only use one size(max or min) even if both are present. You can just go into the creation kit and point it back to the mesh (usually the same as that is there). Then saving the mod.
So... No one knows this armor mod?
Think it is all the same armor http://skyrim.nexusmods.com/mods/28788/ The author has a couple of retextures linked which might be why they look a bit different.