I am currently using WordPress 3.4.2 and WMPL with the setting "per domain languages" which is the only one that can have per domain sitemaps. The configuration of WPML is working well and I am using subdomains.
I have two languages: italian (website.com) and english (en.website.com. WordPress SEO is not creating sitemaps per each language and I have english pages mixed with italian ones. How can I have english pages in a "english sitemap"?