Mark,
It's funny because we had a similar mess back in the '70's when they separated Jovibarba from Sempervivum although we certainly didn't have the numbers of them that we do today, especially the heuffs.
I still keep a "J" on the Jovibarba markers as we actually have a few cultivars that are named the same, such as 'Jade', both a semp and a heuff.
The DNA analysis does show that they form a single clade, which means that they should be in the same genus.
Actually as annoying as this is, the division of Sedum into many genera I find VERY annoying! Hopefully the DNA data will re-unite them too!
Kevin