Mini Frontpage not showing first picture as thumbnail

I'm creating a new Joomla 2.5 website using your extension mini frontpage.
Now I thought everything was about ready, but something strange happens for some reasen mini frontpage is not showing the first picture in my article as thumbnail but it takes the second picture (wich is also the last in that article).

The pictures wich are not showing are inserted via a user with publisher rights via the front-end of the website.
I create a new article and then use content templater to get a template with some data but when I save the article only the last picture is shown.
Anyone has an idea what this could be

Yes that's how it works actually.

When there're 2 images inside the 'introtext part' of your article content then the last image will be processed. Unless you have a horizontal rule readmore tag (which usually created using Readmore button at the bottom of the editor) inside the article that separate 'introtext' and 'fulltext' part of the article so the first or introtext part will be processed.

So you might want to sugggest your publisher to follow that path when creating an article...