Name: Glen Ingram Macleay Is, Qld, Australia (Zone 12a) (Lee Reinke X Rose F Kennedy) X Unk
I suspect the cultivars need to be relooked at by a systematist. It is quite possible there is very little difference to distinguish them and the division is meaningless or - one cultivars more than predominates in horticulture and who knows what it is.
The problem is that when you are young your life it is ruined by your parents. When you are older it is ruined by your children.