Please do not use the Scales Tool for numerical or numerically assigned grades in the gradebook. The tool was originally designed for providing a non-numeric way of evaluating students' performance. Thus, using numerical values will cause issues in the gradebook. We apologize for any inconvenience this may have caused and will hopefully implement a patch for this when rolling out a new version of moodle. If you have any questions regarding using Scales tool, please contact Andrew Bare.