We've been using the free XML sitemap generator for a few years and love it. However, a recent rerun of our main domain's sitemap is not returning URLs from our blog subdirectory. You can see the latest sitemap we ran just after 9/5 here - [external links are visible to admins only]. It is showing all blog URLs.
I'm not the programmer, but to my knowledge and based on his response, we've not changed anything on the code side. And what's odd is that in the recent rerun a URL is getting returned for another subdirectory (downloads) - but all the blog subdirectory URLs have gone missing.
Also puzzling is that fetch as Googlebot can get to all blog URLs we've posted since 9/5 and Xenu picks them all up as well. Robots.txt is not blocking any blog URLs either.
Can you offer any advice on why this may be happening?