With the new builder tools, when I try to update an existing vertical article, a horizontal article is created instead. Per this discussion, http://forums.adobe.com/message/4263493#4263493#4263493 it seems others are having this issue as well, but I'm hoping someone has found a better work-around than deleting the entire article and re-uploading it? I'm running the V18 tools.
We've accepted this as a bug, and we'll track it for a future release. In the meantime, the 'Relink' feature is a very useful workaround to replace an existing layout within an article.
Thanks, and sorry for the inconvenience.
That worked as intended. Thanks for the tip, James!