The (None) indicates there is either no assignments attached to the specific task or that the assignments were never graded.
Gradebook assignments can be linked to specific competency tasks and can be used to calculate competency and task averages. Teachers that do not use this feature should ignore the (None) and “Tab” past the additional field. If teachers do use the feature, the Gradebook average will display and can be used to submit a competency grade.
Additional resources on using Gradebook with Competencies can be found in Help > Grading > Help folder: (click link below to open)