[Plugin: Recent Posts Embed] Posts on top don't appear above the others

Hi,
although it seems that the plugin doesn’t support WP3+, maybe there is help for my problem:
I used the plugin until now without problems (https://www.staedtebauleitplanung.de) , but now it seems that posts which are marked to stay on top are not on top anymore when calling them by the plugin. They appear in the order they where posted. I don’t know when this changed, but it worked well until few time ago. Any hint what to do?
Thanks,
Lars

https://www.ads-software.com/extend/plugins/recent-posts-embed/