Archiving contents of a folder

I'm a college professor and am forced to use Moodle, a learning management system, and some of its time-consuming actions. I'm trying to get Hazel to process my feedback for students; so far, I have the watch folders and sorting working perfectly, but when Hazel puts the various documents into a folder, the "archive" command makes separate compressed files instead of combining the documents into just one compressed file. This is important because the file names in the documents correspond to the individual students and must be uploaded as one compressed file into Moodle. Any ideas?