Are these rightly named?

Two plants that I have grown from seed were in flower today. They don't quite seem right, and I'd welcome views on them please.

Firstly, a plant of Mammillaria blossfeldiana WM5620, from Punta Baja, BCS, grown from Mesa Garden seed. The body looks classic blossfeldiana, but the flowers are really white with a very faint pink mid-stripe. Its young, of course, but quite a surprising colour to the flower.



Next is a plant of Mammillaria dioica DC385, Puerto Liberdad, Sonora, from seed obtained from Jecminek. The body isn't dioica to my mind, more like grahamii or even sheldonii, but it has flowers in which the pink midstripe almost fills the petal producing what at first sight are light pink flowers! I am inclined to think that it is a sheldonii because of the radial spine count rather than a grahamii that has crept further down the coast, but what do you think?

For WM 5620 you can look at this...
https://mammillaria.forumotion.net/t1513-mammillaria-shurliana

Many thanks indeed, Maurillio. I did a search for WM5620, but it didn't find this. I'm very glad your memory is better than mine!