I have a rubric that is a generic template for lab assignments in my course. I have a total of 4 labs, and want to start with the generic template and add specific outcomes for each lab, ending up with a total of 4 rubrics. I copy the rubric, edit it and it saves. As soon as I go to copy the generic rubric again, the lab specific rubric I just finished is no longer in my list of of rubrics. Why do the rubrics keep disappearing?