I've tried this a couple of times now, and it looks to me like "Number of errors" always assigns full points to the submission, regardless of how many of the errors are selected during the Assessment phase. I have no trouble setting up any of the other grading methods and getting them to work as expected. I'm on Moodle 2.1, and I have allocated just one reviewer per submission. I know with only one reviewer the "Grading grade" will always be full value, but I expected the submission grade to reflect the errors selected by the reviewer. Is there a known bug? I tried to search, but couldn't find one. What would you need from me to diagnose this?