<section id=”carte”>[mashup query="post_type=annonce&offre=vente&meta_key=annonce_type&meta_value=appartement&meta_key=annonce_surface&meta_value=100&meta_compare=>=" height="500"]</section><section></section><section>Order is important or not ?</section><section></section><section>Thanks in advance for your help</section>
I think I see the problem: you have two meta_key/meta_values. That’s not possible in the shortcode (it’s a limitation of the WP query module when using strings). You can only use one meta. If possible, convert the non-numeric key to a tag, category, or custom taxonomy instead.