Just a quick update, we've released a new version of the courses module, with a bug fix. There was a problem publishing more than one instance of the module, now this problem is fixed. You can see it live on our own learning center (look on the right side, you'll see the module showing twice: once for the most popular courses and once for the newest courses.
http://learn.ijoomla.com
Some customers also reported that they couldn't download the latest stable version, if you had this issue, please try to download it now, this issue should be fixed.