I'm currently managing Webmaster Tools for some Wordpress sites and I'm curious as to why none of the sites are showing more than 1000 pages submitted. Some of the sites are much larger but I can't find any documentation that would limit the number of submitted pages.
Is it possible to inform us about following?
1) Which sitemap generator is used?
FYI:(from google, https://support.google.com/webmasters/answer/183668?hl=en)