post-sitemap.xml vs post-sitemap1.xml

I have been running into issues with my sites that reach over 1,000 posts and utilize the XML sitemaps from this plugin. When initially using sitemaps in Google Webmasters, I add “post-sitemap.xml” to map my posts. However, once my site reaches 1,000 posts, the sitemaps are broken into two different files (post-sitemap1 and post-sitemap2), which I think is cool. However, the contents of post-sitemap have not disappeared, the spiders still crawl it, but it is not being updated by the plugin. When posts expire, deleted, or updated and relocated to the newest sitemap, post-sitemap doesn’t reflect the changes, resulting in 404 crawl errors.

I propose that the plugin initially create a sitemap titled “post-sitemap.xml” like it currently does. Once the post count reaches 1,000, the original sitemap is not renamed to “post-sitemap1.xml,” but rather the second sitemap is simply generated. Hence, the sitemaps will be generated like this:

post-sitemap.xml
post-sitemap2.xml
post-sitemap3.xml
etc.

http://wordpress.org/extend/plugins/wordpress-seo/