I am having problems using the sort attribute within my GCS request. Whenever I use sort targeting a PageMap element it returns with 0 results. Check it out below. Am I simply missing or misunderstanding something?
Request Without Sort: http://www.google.com/cse?cx=010537259921960391009:s7pan_vavqu&output=xml_no_dtd&q=fire+more:pagemap:course
Request With Sort: http://www.google.com/cse?cx=010537259921960391009:s7pan_vavqu&output=xml_no_dtd&q=fire+more:pagemap:course&sort=course-coursenumber:a