I'm having an issue with the sitemap that is being generated by the WordPress SEO by Yoast plugin.
When I visit http://www.mysite.com/sitemap_index.xml I get the following error in my browser:
"This page contains the following errors:
error on line 5 at column 6: XML declaration allowed only at the start of the document Below is a rendering of the page up to the first error."
Google doesn't seem to be having a problem reading the file. Is this something that I should try to fix?
Also, I submitted http://www.mysite.com/page-sitemap.xml to Google webmaster tools awhile back. Should I remove that one and use sitemap_index.xml.