VirtueMart SEO Bundle: JoomSEF 3+VM; Ordner No. 12849

I'm having the problem that some of the Readmore-Buttons on the front page are not working properly. It's a news category-blog and after clicking the Readmore-Button the full content is displayed right under the blog - you are not redirected to the content page.
Not all Readmores are affected, some Readmore-buttons are displayed correctly (different category)

I'm using Joomla 1.5.22
JoomSEF 3.5.7
JFrouter-Plugin is disabled
JoomSEF-Plugin is enabled

Hello,

In JoomSEF's URLs Manager check that the Itemid stored with the affected URLs match the correct menu item ID.

Best regards,
ARTIO Support Team