I suppose the naming of varieties will never really stop. I keep seeing new ones all the time. Cultivar registration is the only workable solution to the endless confusion non-resistered names generate.
The process of publication and registration is straightforward and simple. It takes about 1/2 hour to write a description, take a photo, and email it to the CPN editors for publication (although the wait is long to see it in print).
Once a cultivar is published, the legitimate name takes precedence over all other names unpublished, or partially published previously without filing all the (few) requirements of the registration process.
So, Bob has now updated his site to reflect this, since Barry did publish 'Dentate' meeting all the requirements that previous authors did not. Growers in turn should also update their labels, growlists and headset to reflect the now (happily)unambiguous status of this particular cultivar.
Whether it will happen is another matter. This is where we all need to educate each other. For example Drosera capensis 'Alba' is the name of choice for the true and legitimate published Drosera capensis 'Albino'. It is always considered proper in the study of botany to offer these type of corrections unsolicited, and improper to take offense at any such correction. This is because the status of plants is always changing, species get reassigned, and new cultivar names are assigned to previously familiar material with familiar names. We all need to keep up on it, and mutual education is the only way this can happen effectively.