I have a domain http://sub.example.com/.
In it there is a wordpress blog at http://sub.example.com/blog and other more static content at http://sub.example.com/other, http://sub.example.com/stuff, etc, etc
As the blog content is updated quite often I use a WP sitemap plugin to generate it for the blog dynamically for convenience. Is there any penalty/negatives in using this while also maintaining a separate one for the whole subdomain bar this blog at http://sub.example.com/sitemap.xml?