Importing XML template has strange behavior when there are comments

WHen trying to import this template, multiple issues occur: https://raw2.github.com/htaira/glubix/master/templates/Template_App_Gluster.xml

1) The import reports successfull even though it is not successful
2) If I remove the XML comments from the file and try to import, then it fails to import with an error: "Incorrect arguments passed to function."
3) It seems like there are problems when importing as host because it succeeds even though there are no interfaces defined (Richlv and volter discovered this and have more info about it)