uploaded images to listings behave erratic and don't show

Hello,

We are using your plugin here: http://crasa.org.za and are now starting to upload listings into the database. We notice a strange behavior when we want to upload a series of pictures into the listing. The links and slideshow code is generated, but the images are not displayed. If I look into the media manager in the admin panel I only find the first uploaded picture in there. If I look at the src links of the images I get something like http://crasa.org.za/wp-content/uploads//904_front-of-shop.jpg (why is it showing // instead of just /, and why is it linking to the uploads folder, not the /uploads/images folder?)

If I add just one picture its displayed correctly, as the featured image in the admin view and on the listing, but once I upload a second picture that first image disappears and the second image becomes visible, while only the surrounding code of the first image stays, but the link to the image is not working any more. I have tried to find if I missed to set some upload folder link somewhere in the settings but couldn’t find that.

Can you let me know what is going wrong here? I will give you login details with the next (private) post on this thread.