Sticky post on blog page

Hello,

There is double issue about choosing a sticky post and displaying posts in a blog page :

– the sticky post remains when using random with WP Show Posts : http://cuicui.be/alea-jacta-est/

– a problem appears about the number of posts displayed when the first one is medium sized while WP Show Posts doesn't offer this option. An empty space is created in blog pages. Example : http://cuicui.be/fr/asia/china/

Any idea is most welcome :-)

tito./