trouble with breadcrumbs

In menusettings is view category und link category disabled.
but in breadcrumbs is a link to a category blog included.
see www.newpage.tc-brackel.de/index.php/unse...n/58-mitglied-werden .

what can I do to hide the link to category blog?

Re-arrange category hierarchy , make "9-verein" root category

there are no category hierarchy, all categories are root categories. See attachment.

The breadcrumbs is ok, if you klick any menu item.

The duplicate entry only appears in breadcrumbs, if you klick on read-more-button and the whole item is displayed.

So breadcrumbs is formed form menu item aliases ?

menu item "Verein" has alias "unser-verein"
categorie "Verein" has alias "verein"
Breadcrumbs show first home/verein and after klick on read-more-button home/verein/verein/name of article.

Our website was build with joomla 2.5 and everything was ok. the problem came with joomla 3

You can try some alternative breadcrumbs module